C11111333133313232233133313331333131133132313331322121111113212111   >>    C1111133313331323223313331333133313113313231333132212111111321211   <<    C11111333133313232233133313331333131133132313331322121111113212113   >>      C11111333133313232233133313331333131133132313331322121111113212112   >>