I wanna uninstall some program via bash script. After run the command - terminal asking me if I'm sure that I want to uninstall it. So I need to answer "y". I want to do it automatically and answer "y" after delay of 10 seconds. 

I did this example but it's not working -
#!/usr/bin
/opt/MNG/MNGVIEWHP/fe/uninstall
sleep 10
echo "y"

Any idea? 
BTW - Centos 7.2