C1111233131211111211113313331333133313232321333133313331323121121132311   >>    C111123313121111121111331333133313331323232133313331333132312112113231   <<    C1111233131211111211113313331333133313232321333133313331323121121132313   >>      C1111233131211111211113313331333133313232321333133313331323121121132312   >>