D12121212213231323132323323132322331311331313232233132313133112121   >>    D1212121221323132313232332313232233131133131323223313231313311212   <<    D12121212213231323132323323132322331311331313232233132313133112123   >>      D12121212213231323132323323132322331311331313232233132313133112122   >>