C1111233131211111211113313331333133313331322322331312111133132211233131   >>    C111123313121111121111331333133313331333132232233131211113313221123313   <<    C1111233131211111211113313331333133313331322322331312111133132211233133   >>      C1111233131211111211113313331333133313331322322331312111133132211233132   >>