C11111333133313232233133313331333133313331322121111112113121231   >>    C1111133313331323223313331333133313331333132212111111211312123   <<    C11111333133313232233133313331333133313331322121111112113121233   >>      C11111333133313232233133313331333133313331322121111112113121232   >>