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