D1212121212131323223313233231323331313231333131323211331323132313212331   >>    D121212121213132322331323323132333131323133313132321133132313231321233   <<    D1212121212131323223313233231323331313231333131323211331323132313212333   >>      D1212121212131323223313233231323331313231333131323211331323132313212332   >>