C1111233131211111211113313331333133313232321333133313232233132312211121   >>    C111123313121111121111331333133313331323232133313331323223313231221112   <<    C1111233131211111211113313331333133313232321333133313232233132312211123   >>      C1111233131211111211113313331333133313232321333133313232233132312211122   >>