Hii Pavan Kalyan..

Don't worry you can get that back.

All you need is the memo number which will be on the top left corner.

You can get your long memo back from board authority by following through steps(check below link).

Brief steps are given in this site. check- https://ssc.nic-online.in/what-is-ssc-memo-number/

Hope this helps you. All the best.