C1111133313331323223313331333133313311211111211331333131211111212223231   >>    C111113331333132322331333133313331331121111121133133313121111121222323   <<    C1111133313331323223313331333133313311211111211331333131211111212223233   >>      C1111133313331323223313331333133313311211111211331333131211111212223232   >>