C11111333133313232233133313331333131133132313311211111333312121   >>    C1111133313331323223313331333133313113313231331121111133331212   <<    C11111333133313232233133313331333131133132313311211111333312123   >>      C11111333133313232233133313331333131133132313311211111333312122   >>