D12121212121313231311331323112331322132313231333131133132313233313232212131   >>    D1212121212131323131133132311233132213231323133313113313231323331323221213   <<    D12121212121313231311331323112331322132313231333131133132313233313232212133   >>      D12121212121313231311331323112331322132313231333131133132313233313232212132   >>