Byomkesh Bakshi has visited his friends Ajit just to discover that Ajit neighbor Dr. A.P Bindu was murdered. Dr. Bindu, who is a mathematician wrote the murderer name as a cipher "Hcqtfz". There were five suspects
1. Ajit
2. Another neighbor "Pankaj"
3. The servant "Ganpat"
4. The security guard "Deenu"
5. Dr brother "Hariya".

Byomkesh Bakshi instantly able to find the murderer.
Can you?

Ganpat

Cipher can be cracked as
G + 1 characters-> H
a + 2 characters-> c
n + 3 characters-> q
p + 4 characters-> t
a + 5 characters-> f
t + 6 characters-> z