C1111233131211111211113313331333133313232321333133313112113231323311   >>    C111123313121111121111331333133313331323232133313331311211323132331   <<    C1111233131211111211113313331333133313232321333133313112113231323313   >>      C1111233131211111211113313331333133313232321333133313112113231323312   >>