C11111333133313232233133313331333131133132313311211111313311211   >>    C1111133313331323223313331333133313113313231331121111131331121   <<    C11111333133313232233133313331333131133132313311211111313311213   >>      C11111333133313232233133313331333131133132313311211111313311212   >>