for yd in 1 0.5 0.2
do

for dt in 0.01 0.0001
do

echo $yd $dt
orbit_euler.py 1 0 0 $yd $dt 40 1 > kep.ydot$yd.eul.dt$dt 
orbit_leapfrog.py 1 0 0 $yd $dt 40 1 > kep.ydot$yd.leap.dt$dt 

done
done