diff --git a/implementation.py b/implementation.py
index ff6c862..5647f73 100644
--- a/implementation.py
+++ b/implementation.py
@@ -4,27 +4,31 @@ def encode(al, key, msg):
 	tmp = '';
 	hash = '';
 	for i in range(0, len(msg)): # parcourt chaque caractere du message
-		tmp = msg[i]
-		for j in range(1, len(al)): # parcourt les alphabets du premier au dernier
-			tmp = al[j][ al[j-1].index(tmp) ];
-		hash += tmp
+		tmp = al[1].index( msg[i] );
+		hash += al[len(al)-1][tmp];
+		
+	# decale le premier alphabet d'un cran, le deuxieme si le premier depasse
+	for i in range(1, len(al)):
+		print i;
 	return hash;
 	
 alphabet = [];
+alphabet.append( [] )
 alphabet.append( ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'] )
 alphabet.append( ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'] )
 alphabet.append( ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'] )
 
-for i in range(0, len(alphabet)):
+for i in range(1, len(alphabet)):
 	random.shuffle( alphabet[i] );
+	alphabet[0].append( alphabet[i][0] );
 	print alphabet[i]
 print 
 
 code = raw_input("Votre message: ")
 # demande la saisie des cles (positions initiales)
-key = [0,0,0,0];
-for i in range(0, len(key)):
-	key[i] = raw_input('Cle n%d : ' % (i+1) )
-	
+key = [];
+for i in range(0, len(alphabet)):
+	key.append( raw_input('Cle n%d : ' % (i+1) ) )
+print
 
 print encode(alphabet, key, code);