diff --git a/Project_Model/Libs/BPE/Classes/NanoSocratesBPE.py b/Project_Model/Libs/BPE/Classes/NanoSocratesBPE.py
index a74412d..a5dab9b 100644
--- a/Project_Model/Libs/BPE/Classes/NanoSocratesBPE.py
+++ b/Project_Model/Libs/BPE/Classes/NanoSocratesBPE.py
@@ -163,10 +163,10 @@ class NanoSocratesBPE(Encoder):
             # in this case there was a candidate token to substitute the couple of element
             NEW_PIECE.append(CANDIDATE_TOKEN)
 
-            index += 1
+            index += 2
+            
             if index == PIECE_LENGTH:
                     NEW_PIECE.append(piece[index])
-            index += 1
 
         return NEW_PIECE