print("::::::::::::::::::::::::::::::::::::::::::::::::::::::::::")

monty_python = "Monty Python"
print(monty_python)

print(monty_python.lower())

print(monty_python.upper())

print("-------------------------------------------------------")

cadena = "me gusta escuchar a NIRVANA"
print(cadena.lower())
print(cadena.upper())

print("::::::::::::::::::::::::::::::::::::::::::::::::::::::::::")
