C1111233131211111211113313331333133313232321333133313112113231323231   >>    C111123313121111121111331333133313331323232133313331311211323132323   <<    C1111233131211111211113313331333133313232321333133313112113231323233   >>      C1111233131211111211113313331333133313232321333133313112113231323232   >>