C1111233131211111211113313331333133313232321333133313331121133132323311   >>    C111123313121111121111331333133313331323232133313331333112113313232331   <<    C1111233131211111211113313331333133313232321333133313331121133132323313   >>      C1111233131211111211113313331333133313232321333133313331121133132323312   >>