def sponge(stringington):
    lengthofhim = len(stringington)
    indexo = 0
    listino = []
    while indexo < lengthofhim:
        if indexo % 2 == 0:
            newboy = (stringington[indexo].lower())
        else:
            newboy = (stringington[indexo].upper())
        listino.append(newboy)
        indexo += 1
    theoutput = "".join(listino)
    return theoutput

if __name__ == "__main__":
    x = input("Type something here.\n")
    print("\n" + sponge(x))