diff --git a/admin/sync/README.md b/admin/sync/README.md
index 50e767fe..cc598c99 100644
--- a/admin/sync/README.md
+++ b/admin/sync/README.md
@@ -20,7 +20,7 @@ Tous les textes doivent utiliser l'encodage UTF8.
             - `[[flag]]` : drapeau classique à valider pour résoudre le challenge :
 			    * `id = 42` : (facultatif) identifiant du flag au sein de l'exercice, pour définir des dépendances ;
                 * `label = "Intitulé"` : (facultatif, par défaut : `Flag`) intitulé du drapeau ;
-                * `raw = 'MieH2athxuPhai6u'` : drapeau exact à trouver ;
+                * `raw = 'MieH2athxuPhai6u'` ou `raw = ['part1', 'part2']` : drapeau exact à trouver ; sous forme de tableau, le participant n'aura pas connaissaance du nombre d'éléments ;
 		    	* `validator_regexp = "^(?:sudo +)?(.*)$"` : (facultatif) expression rationnelle dont les groupes capturés serviront comme chaîne à valider (notez que `?:` au début d'un groupe ne le capturera pas) ;
                 * `ignorecase = true` : (facultatif, par défaut : `false`) ignore la case de ce drapeau ;
 		    	* `help = "Indication"` : (facultatif) chaîne de caractères placée sous le champ du formulaire, idéale pour donner une indication de format ;
diff --git a/admin/sync/exercice_defines.go b/admin/sync/exercice_defines.go
index ce031da6..006bc5d6 100644
--- a/admin/sync/exercice_defines.go
+++ b/admin/sync/exercice_defines.go
@@ -29,7 +29,8 @@ type ExerciceUnlockFile struct {
 type ExerciceFlag struct {
 	Id          int64
 	Label       string               `toml:",omitempty"`
-	Raw         string
+	Raw         interface{}
+	Separator   string               `toml:",omitempty"`
 	IgnoreCase  bool                 `toml:",omitempty"`
 	ValidatorRe string               `toml:"validator_regexp,omitempty"`
 	Help        string               `toml:",omitempty"`
diff --git a/admin/sync/exercice_keys.go b/admin/sync/exercice_keys.go
index 4501dab6..8458489c 100644
--- a/admin/sync/exercice_keys.go
+++ b/admin/sync/exercice_keys.go
@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"math/rand"
 	"path"
+	"strings"
 	"unicode"
 
 	"srs.epita.fr/fic-server/libfic"
@@ -43,16 +44,61 @@ func SyncExerciceFlags(i Importer, exercice fic.Exercice) (errs []string) {
 		kmap := map[int64]fic.Flag{}
 
 		// Import normal flags
+	flags:
 		for nline, flag := range params.Flags {
 			if len(flag.Label) == 0 {
 				flag.Label = "Flag"
 			}
 
-			if !isFullGraphic(flag.Raw) {
+			if flag.Label[0] == '`' {
+				errs = append(errs, fmt.Sprintf("%q: flag #%d: Label should not begin with `.", path.Base(exercice.Path), nline + 1))
+				flag.Label = flag.Label[1:]
+			}
+
+			// Concatenate array
+			var raw string
+			if f, ok := flag.Raw.([]interface{}); ok {
+				if len(flag.ValidatorRe) > 0 {
+					errs = append(errs, fmt.Sprintf("%q: flag #%d: ValidatorRe cannot be defined for this kind of flag.", path.Base(exercice.Path), nline + 1))
+					flag.ValidatorRe = ""
+				}
+
+				if len(flag.Separator) == 0 {
+					flag.Separator = ","
+				} else if len(flag.Separator) > 1 {
+					flag.Separator = string(flag.Separator[0])
+					errs = append(errs, fmt.Sprintf("%q: flag #%d: separator truncated to %q", path.Base(exercice.Path), nline + 1, flag.Separator))
+				}
+
+				for i, v := range f {
+					if g, ok := v.(string); ok {
+						if strings.Index(g, flag.Separator) != -1 {
+							errs = append(errs, fmt.Sprintf("%q: flag #%d: flag items cannot contain %q character as it is used as separator. Change the separator attribute for this flag.", path.Base(exercice.Path), nline + 1, flag.Separator))
+							continue flags
+						} else {
+							raw += g + flag.Separator
+						}
+					} else {
+						errs = append(errs, fmt.Sprintf("%q: flag #%d, item %d has an invalid type: can only be string, is %T.", path.Base(exercice.Path), nline + 1, i, v))
+						continue flags
+					}
+				}
+
+				flag.Label = "`" + flag.Separator + flag.Label
+			} else if f, ok := flag.Raw.(int64); ok {
+				raw = fmt.Sprintf("%d", f)
+			} else if f, ok := flag.Raw.(string); !ok {
+				errs = append(errs, fmt.Sprintf("%q: flag #%d has an invalid type: can only be []string or string, not %T", path.Base(exercice.Path), nline + 1, flag.Raw))
+				continue
+			} else {
+				raw = f
+			}
+
+			if !isFullGraphic(raw) {
 				errs = append(errs, fmt.Sprintf("%q: WARNING flag #%d: non-printable characters in flag, is this really expected?", path.Base(exercice.Path), nline + 1))
 			}
 
-			if k, err := exercice.AddRawFlag(flag.Label, flag.Help, flag.IgnoreCase, validatorRegexp(flag.ValidatorRe), []byte(flag.Raw), 0); err != nil {
+			if k, err := exercice.AddRawFlag(flag.Label, flag.Help, flag.IgnoreCase, validatorRegexp(flag.ValidatorRe), []byte(raw), 0); err != nil {
 				errs = append(errs, fmt.Sprintf("%q: error flag #%d: %s", path.Base(exercice.Path), nline + 1, err))
 				continue
 			} else {
diff --git a/frontend/static/js/challenge.js b/frontend/static/js/challenge.js
index 0dff9a73..7affdcde 100644
--- a/frontend/static/js/challenge.js
+++ b/frontend/static/js/challenge.js
@@ -171,6 +171,10 @@ angular.module("FICApp", ["ngRoute", "ngSanitize"])
 		    angular.forEach(exercice.flags, function(flag, fid) {
 			if ($scope.my && $scope.my.exercices[eid] && $scope.my.exercices[eid].flags[fid] && $scope.my.exercices[eid].flags[fid].value !== undefined)
 			    data.exercices[eid].flags[fid].value = $scope.my.exercices[eid].flags[fid].value;
+			if ($scope.my && $scope.my.exercices[eid] && $scope.my.exercices[eid].flags[fid] && $scope.my.exercices[eid].flags[fid].values !== undefined)
+			    data.exercices[eid].flags[fid].values = $scope.my.exercices[eid].flags[fid].values;
+			else
+			    data.exercices[eid].flags[fid].values = [""];
 		    });
 		});
 		angular.forEach(data.exercices, function(exercice, eid) {
@@ -270,6 +274,10 @@ angular.module("FICApp", ["ngRoute", "ngSanitize"])
 	var cbs;
 	var cbd;
 
+	$scope.additem = function(key) {
+	    key.values.push("");
+	};
+
 	$scope.ssubmit = function() {
 	    var resp = {}
 	    var check = undefined
@@ -279,6 +287,22 @@ angular.module("FICApp", ["ngRoute", "ngSanitize"])
 	    {
 		resp["flags"] = {};
 		angular.forEach($scope.my.exercices[$rootScope.current_exercice].flags, function(flag,kid) {
+		    if (flag.values !== undefined) {
+			if (flag.separator) {
+			    for (var i = flag.values.length - 1; i >= 0; i--) {
+				if (!flag.values[i].length)
+				    flag.values.splice(i, 1);
+			    }
+
+			    flag.value = flag.values.join(flag.separator) + flag.separator;
+
+			    if (flag.values.length == 0)
+				flag.values = [""];
+			}
+			else
+			    flag.value = flag.values[0];
+		    }
+
 		    if (flag.found == null) {
 			if (flag.soluce !== undefined) {
 			    if (check === undefined) check = true;
diff --git a/frontend/static/views/defi.html b/frontend/static/views/defi.html
index 2f98682a..5db7b3bd 100644
--- a/frontend/static/views/defi.html
+++ b/frontend/static/views/defi.html
@@ -88,15 +88,20 @@
 		<div class="form-group" ng-repeat="(kid,key) in my.exercices[current_exercice].flags">
 		  <label for="sol_{{ kid }}">{{ key.label }}&nbsp;:</label>
 		  <span ng-if="key.found && key.value" ng-bind="key.value"></span>
-		  <div class="input-group">
-		    <input type="text" class="form-control" id="sol_{{ kid }}" autocomplete="off" name="sol_{{ kid }}" ng-model="key.value" ng-if="!key.found && !key.choices">
-		    <select class="custom-select" id="sol_{{ kid }}" name="sol_{{ kid }}" ng-model="key.value" ng-if="!key.found && key.choices" ng-options="l as v for (l, v) in key.choices"></select>
+		  <div class="input-group" ng-repeat="v in key.values track by $index" ng-class="{'mt-1': !$first}" ng-if="!key.found">
+		    <input type="text" class="form-control" id="sol_{{ kid }}_{{ $index }}" autocomplete="off" name="sol_{{ kid }}" ng-model="key.values[$index]" ng-if="!key.choices">
+		    <select class="custom-select" id="sol_{{ kid }}" name="sol_{{ kid }}" ng-model="key.values[$index]" ng-if="key.choices" ng-options="l as v for (l, v) in key.choices"></select>
 		    <div class="input-group-append" ng-if="key.choices_cost">
 		      <button class="btn btn-success" type="button" ng-click="wantchoices(kid)" ng-class="{disabled: key.wcsubmitted}" title="Cliquez pour échanger ce champ de texte par une liste de choix. L'opération vous coûtera {{ key.choices_cost }} points.">
 			<span class="glyphicon glyphicon-tasks" aria-hidden="true"></span>
 			Liste de propositions ({{ key.choices_cost }} points)
 		      </button>
 		    </div>
+		    <div class="input-group-append" ng-if="key.separator && $last">
+		      <button class="btn btn-success" type="button" ng-click="additem(key)" title="Ajouter un élément.">
+			<span class="glyphicon glyphicon-plus" aria-hidden="true"></span>
+		      </button>
+		    </div>
 		  </div>
 		  <small class="form-text text-muted" ng-if="!key.found && key.help.length > 0" ng-bind="key.help"></small>
 		  <span class="glyphicon glyphicon-ok form-control-feedback text-success" aria-hidden="true" ng-if="key.found" title="Flag trouvé à {{ key.found | date:'mediumTime'}}"></span>
diff --git a/libfic/team_my.go b/libfic/team_my.go
index bddc8417..30382c25 100644
--- a/libfic/team_my.go
+++ b/libfic/team_my.go
@@ -39,6 +39,7 @@ type myTeamMCQ struct {
 type myTeamFlag struct {
 	Label       string            `json:"label"`
 	Help        string            `json:"help,omitempty"`
+	Separator   string            `json:"separator,omitempty"`
 	Solved      *time.Time        `json:"found,omitempty"`
 	Soluce      string            `json:"soluce,omitempty"`
 	Choices     map[string]string `json:"choices,omitempty"`
@@ -194,7 +195,12 @@ func MyJSONTeam(t *Team, started bool) (interface{}, error) {
 							flag.Solved = t.HasPartiallySolved(k)
 						}
 
-						flag.Label = k.Label
+						if k.Label[0] == '`' && len(k.Label) > 2 {
+							flag.Label = k.Label[2:]
+							flag.Separator = string(k.Label[1])
+						} else {
+							flag.Label = k.Label
+						}
 
 						if flag.Solved == nil {
 							flag.Help = k.Help