program that search string in text file and do something

[ast]

<alon.najman at gmail.com> a écrit dans le message de 
news:f705c092-de18-4c37-bde1-42316e8de753 at googlegroups.com...
On Friday, August 4, 2017 at 12:27:02 PM UTC+3, ast wrote:
> <alon.najman at gmail.com> a écrit dans le message de
> news:b6cc4ee5-71be-4550-be3e-59ebeee7a01b at googlegroups.com...

> thanks man! that works

I hope it is not a school homework