C1111233131211111211113313331333133313331333133313331331121111113313232211   >>    C111123313121111121111331333133313331333133313331333133112111111331323221   <<    C1111233131211111211113313331333133313331333133313331331121111113313232213   >>      C1111233131211111211113313331333133313331333133313331331121111113313232212   >>