C1111133313331323223313331333133313331333131211113313331323211221   >>    C111113331333132322331333133313331333133313121111331333132321122   <<    C1111133313331323223313331333133313331333131211113313331323211223   >>      C1111133313331323223313331333133313331333131211113313331323211222   >>