D1212121212131323131133132311233132213231323133313113313233313221121   >>    D121212121213132313113313231123313221323132313331311331323331322112   <<    D1212121212131323131133132311233132213231323133313113313233313221123   >>      D1212121212131323131133132311233132213231323133313113313233313221122   >>