D1212121212131323131133132311233132322331323321211113313231323133322331   >>    D121212121213132313113313231123313232233132332121111331323132313332233   <<    D1212121212131323131133132311233132322331323321211113313231323133322333   >>      D1212121212131323131133132311233132322331323321211113313231323133322332   >>