def swap_case(s): l =[] for char in s: if char.islower(): char = char.upper() l.append(char) elif char.isupper(): char =char.lower() l.append(char) else: l.append(char)
l1 =''.join(l)

return l1

if name == 'main': s = input() result = swap_case(s) print(result)****