D1212121212131323131133132311233132322331333133322132313231323111   >>    D121212121213132313113313231123313232233133313332213231323132311   <<    D1212121212131323131133132311233132322331333133322132313231323113   >>      D1212121212131323131133132311233132322331333133322132313231323112   >>