C1111133313331323223313331333133313311211111211331333131211111133231311   >>    C111113331333132322331333133313331331121111121133133313121111113323131   <<    C1111133313331323223313331333133313311211111211331333131211111133231313   >>      C1111133313331323223313331333133313311211111211331333131211111133231312   >>