C1111133313331323223313331333133313331323131211113313223133112121   >>    C111113331333132322331333133313331333132313121111331322313311212   <<    C1111133313331323223313331333133313331323131211113313223133112123   >>      C1111133313331323223313331333133313331323131211113313223133112122   >>