class LetterList:
def __init__(self, n): self.n = n
def __len__(self): return self.n
def __getitem__(self, i): return chr(ord('A') + i)
x = LetterList(3)
print(x[0], x[1], x[2])
Y2xhc3MgTGV0dGVyTGlzdDoKCWRlZiBfX2luaXRfXyhzZWxmLCBuKTogc2VsZi5uID0gbgoJZGVmIF9fbGVuX18oc2VsZik6IHJldHVybiBzZWxmLm4KCWRlZiBfX2dldGl0ZW1fXyhzZWxmLCBpKTogcmV0dXJuIGNocihvcmQoJ0EnKSArIGkpCgp4ID0gTGV0dGVyTGlzdCgzKQpwcmludCh4WzBdLCB4WzFdLCB4WzJdKQ==