[anon_c]

"this encryption is made from "md5 algo" + "simple adding algo" and adding is not part of md5 and programmer used adding after using md5 ."

That is exactly how I understand the problem.

Now, for the "simple adding algo" to work (at least the way you presented it in your first post), the MD5 should give you bytes (the 32 chars of the md5 divided into 16 bytes) containing only values between 0x60 and 0x92 ! That is the problem.

For instance, if you hash "exetools", you get:

DC67724E1CCF839C05957C27F9862499
DC 67 72 4E 1C CF 83 9C 05 95 7C 27 F9 86 24 99
What will the "simple adding algo" do with the values DC or 24?