I want to uninstall some program via a bash script. After I run the command, the terminal asking me if I am 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