D1212121212131323131133132311233132313331323221133132313132322131   >>    D121212121213132313113313231123313231333132322113313231313232213   <<    D1212121212131323131133132311233132313331323221133132313132322133   >>      D1212121212131323131133132311233132313331323221133132313132322132   >>