#!/bin/bash
myprog < input1 > output1 &
myprog < input2 > output2 &
myprog < input3 > output3 &
myprog < input4 > output4 &
myprog < input5 > output5 &
myprog < input6 > output6 &
myprog < input7 > output7 &
myprog < input8 > output8 &
wait