C1111233131211111211113313331333133313331333133313331333133313112331231   >>    C111123313121111121111331333133313331333133313331333133313331311233123   <<    C1111233131211111211113313331333133313331333133313331333133313112331233   >>      C1111233131211111211113313331333133313331333133313331333133313112331232   >>