FBI need to break the vault but the problem is that they are not able to break the vault.

On the vault, a text is written as:
31 11 33 33 43 45
21 25
31 24 11 31 51 41


To Break the code FBI brings a mathematician named Charles.
Minutes later he deciphers the code.

Whats the code?

Decipher Code Brain Teaser

CANNOT BE CRACKED


This code can be cracked with the help of table below.
i.e
31 => 3rd row and 1st column => C
11 => 1st row and 1st column => A
33 => 3rd row and 3rd column => N
and so on....