C11111333133313232233133313331333131133131211111333132313332212111113211211   >>    C1111133313331323223313331333133313113313121111133313231333221211111321121   <<    C11111333133313232233133313331333131133131211111333132313332212111113211213   >>      C11111333133313232233133313331333131133131211111333132313332212111113211212   >>