C12121212311232322331313232233132333132313133313113313231121231   >>    C1212121231123232233131323223313233313231313331311331323112123   <<    C12121212311232322331313232233132333132313133313113313231121233   >>      C12121212311232322331313232233132333132313133313113313231121232   >>