C11111333133313232233133313331333131133131211111333132313332212111113112121   >>    C1111133313331323223313331333133313113313121111133313231333221211111311212   <<    C11111333133313232233133313331333131133131211111333132313332212111113112123   >>      C11111333133313232233133313331333131133131211111333132313332212111113112122   >>