C1111133313331323223313331333133313331333232233133112111133231211   >>    C111113331333132322331333133313331333133323223313311211113323121   <<    C1111133313331323223313331333133313331333232233133112111133231213   >>      C1111133313331323223313331333133313331333232233133112111133231212   >>