D12121212121313231311331323112331323223313222213231323132323231   >>    D1212121212131323131133132311233132322331322221323132313232323   <<    D12121212121313231311331323112331323223313222213231323132323233   >>      D12121212121313231311331323112331323223313222213231323132323232   >>