Rendre toute la phrase en minuscule utilisez les fonctions lower() et set() python code example
Example: python mettre en minuscule
caractereMin = "d"
caractereMaj = "J"
print(caractereMin.upper())
print(caractereMaj.lower())
caractereMin = "d"
caractereMaj = "J"
print(caractereMin.upper())
print(caractereMaj.lower())