C1111233131211111211113313331333133313331322322331312111112133112121   >>    C111123313121111121111331333133313331333132232233131211111213311212   <<    C1111233131211111211113313331333133313331322322331312111112133112123   >>      C1111233131211111211113313331333133313331322322331312111112133112122   >>