C1111233131211111211113313331333133313331312331333133112323132211113323231   >>    C111123313121111121111331333133313331333131233133313311232313221111332323   <<    C1111233131211111211113313331333133313331312331333133112323132211113323233   >>      C1111233131211111211113313331333133313331312331333133112323132211113323232   >>