split -l 10 input.txt
mv xaa 1.txt
mv xab 2.txt
rm x*
./susan 1.txt 2.txt
rm 1.txt.out 2.txt.out
cat *.final > final.out
cat final.out
#sed -e '1d' final.out > tmp
rm *.final
rm 1.txt 2.txt
#diff input.txt final.out
echo