D12121212121313231311331323112331323223313233212111133132212111   >>    D1212121212131323131133132311233132322331323321211113313221211   <<    D12121212121313231311331323112331323223313233212111133132212113   >>      D12121212121313231311331323112331323223313233212111133132212112   >>