C1111133313331323223313331333133313311211111213331323223313221211   >>    C111113331333132322331333133313331331121111121333132322331322121   <<    C1111133313331323223313331333133313311211111213331323223313221213   >>      C1111133313331323223313331333133313311211111213331323223313221212   >>