C1111233131211111211113313331333133313232321333133313223311233113231   >>    C111123313121111121111331333133313331323232133313331322331123311323   <<    C1111233131211111211113313331333133313232321333133313223311233113233   >>      C1111233131211111211113313331333133313232321333133313223311233113232   >>