D1212121212131323131133132311233132322331333133322132313231323132322311   >>    D121212121213132313113313231123313232233133313332213231323132313232231   <<    D1212121212131323131133132311233132322331333133322132313231323132322313   >>      D1212121212131323131133132311233132322331333133322132313231323132322312   >>