# ex02.py

def cMajusculaAminuscula(cU):
    if (cU >= 'A') and (cU <= 'Z'):
        return cU.lower()
    return cU


def main():
    szCadena = "aBcDeF 1234 xYz"
    for cC  in szCadena:
        print("%c" % cMajusculaAminuscula(cC), end = ' ')
    print()

main()