username = input()
command = input().split()

while command != "Sign up":
    if command[0] == 'Case':
        if command[1] == 'lower':
            print(username.lower())
        elif command[1] == 'upper':
            print(username.upper())



    elif command[0] == 'Reverse':
        start_index = command[1]
        end_index = command[2]
	command = input()