C11111333133313232233133313331333131133132313311211111133132211211   >>    C1111133313331323223313331333133313113313231331121111113313221121   <<    C11111333133313232233133313331333131133132313311211111133132211213   >>      C11111333133313232233133313331333131133132313311211111133132211212   >>