D1212121212131323223313233231323132313331323331322132313231311331   >>    D121212121213132322331323323132313231333132333132213231323131133   <<    D1212121212131323223313233231323132313331323331322132313231311333   >>      D1212121212131323223313233231323132313331323331322132313231311332   >>