D1212121212131323131133132311233132313231323221333132333132333132221311   >>    D121212121213132313113313231123313231323132322133313233313233313222131   <<    D1212121212131323131133132311233132313231323221333132333132333132221313   >>      D1212121212131323131133132311233132313231323221333132333132333132221312   >>