diff --git a/Project_Model/Libs/BPE/Enums/SpecialToken.py b/Project_Model/Libs/BPE/Enums/SpecialToken.py
index b3c42c1..b14a723 100644
--- a/Project_Model/Libs/BPE/Enums/SpecialToken.py
+++ b/Project_Model/Libs/BPE/Enums/SpecialToken.py
@@ -21,4 +21,7 @@ class SpecialToken(Enum):
     # NanoSocrates
     START = "<START>"
     CORPUS_END = "<END>"
-    PAD = "<PAD>"
\ No newline at end of file
+    START_OF_SEQUENCE = "<SOS>"
+    END_OF_SEQUENCE = "<EOS>"
+    PAD = "<PAD>"
+    
\ No newline at end of file