C11111333133313232233133313331333133313331312111133133313112113313331221   >>    C1111133313331323223313331333133313331333131211113313331311211331333122   <<    C11111333133313232233133313331333133313331312111133133313112113313331223   >>      C11111333133313232233133313331333133313331312111133133313112113313331222   >>