C1111233131211111211113313331333133313231323331322133313232233331   >>    C111123313121111121111331333133313331323132333132213331323223333   <<    C1111233131211111211113313331333133313231323331322133313232233333   >>      C1111233131211111211113313331333133313231323331322133313232233332   >>