D12121212213231323132323323132322331311331313232233132313231312121   >>    D1212121221323132313232332313232233131133131323223313231323131212   <<    D12121212213231323132323323132322331311331313232233132313231312123   >>      D12121212213231323132323323132322331311331313232233132313231312122   >>