def generer_ordre(cle):
    ordre_insertion = cle
    alphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'
    for lettre in alphabet:
        if lettre not in ordre_insertion:
            ordre_insertion = ordre_insertion + lettre
    return ordre_insertion

print(generer_ordre('AXU7'))

def grille_vide(n):
    return [['' for _ in range(n)] for _ in range(n)]

def generer_grille(cle):
    ordre_insertion = generer_ordre(cle)
    grille = grille_vide(6)
    indice = 0
    for i in range(6):
        for j in range(6):
            grille[i][j] = ordre_insertion[indice]
            indice = indice + 1
    return grille

print(generer_grille('SECURITY1024'))

def dechiffrer(cle, message):
    resultat = ''
    grille = generer_grille(cle)
    for t in message:
        resultat = resultat + grille[t[0]-1][t[1]-1]
    return resultat

assert dechiffrer('2048ALGORITHMES',[(4,4),(3,3),(2,4)]) == 'NSI'

def generer_dico(cle):
    dico = {}
    grille = generer_grille(cle)
    for i in range(6):
        for j in range(6):
            dico[grille[i][j]] = (i+1, j+1)
    return dico

def chiffrer(cle, message):
    resultat = []
    dico = generer_dico(cle)
    for t in message:
        resultat.append(dico[t])
    return resultat