C1111233131211111211113313331323133313331333133313112211113323231   >>    C111123313121111121111331333132313331333133313331311221111332323   <<    C1111233131211111211113313331323133313331333133313112211113323233   >>      C1111233131211111211113313331323133313331333133313112211113323232   >>