Sorry, newbie here. I have the following shell script which basically executes the sh-n-body.i686 program a specified number of times. However, before the sh-n-body.i686 begins its calculations it prompts for input from the user. In this case the user would have press ". return" and sh-n-body.i686 will continue running. However, I just want the code to run about 100 times without having to enter . return. How can I modify the shell script so that it takes care of the prompt( . return).

#!/bin/sh
COUNTER=0
while [ $COUNTER -lt 100 ]; do
./sh-n-body.i686 56 3 32 0.02 1 -2 | grep "longest shadow"
let COUNTER=COUNTER+1
done

Thank you