D1212121212131323223313233231323331313231333131323211331323113131   >>    D121212121213132322331323323132333131323133313132321133132311313   <<    D1212121212131323223313233231323331313231333131323211331323113133   >>      D1212121212131323223313233231323331313231333131323211331323113132   >>