Alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
Jours_de_la_semaine =  "Lundi, Mardi, Mercredi, Jeudi, Vendredi, samedi, dimanche"
Lundi = 1
Mardi = 2
Mercredi = 3
Jeudi = 4
Vendredi = 5
Samedi = 6
Dimanche = 7