# ex05.py

def bMajusculaAminuscula(cU):
    return (cU != cU.lower())

def main():
    szCadena = "aBcDeF 1234 xYz"

    for cC in szCadena:
        if bMajusculaAminuscula(cC):
            print("Convertit %c a %c"%(cC,cC.lower()))
main()