python trouver plusieurs lettres dans une chaîne
text = 'Allowed Hello Hollow'
index = 0
while index < len(text):
index = text.find('ll', index)
if index == -1:
break
print('ll found at', index)
index += 2 # +2 because len('ll') == 2
ll found at 1
ll found at 10
ll found at 16
M1L SAQ