C1111133313331323223313331333133313331333131211113313311211111211113313132121   >>    C111113331333132322331333133313331333133313121111331331121111121111331313212   <<    C1111133313331323223313331333133313331333131211113313311211111211113313132123   >>      C1111133313331323223313331333133313331333131211113313311211111211113313132122   >>