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

Question

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?

Answer 1

Given text is incorrect.

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If it was

31 11 33 33 43 45
21 51
31 24 11 31 52 51 41

then the code would be "Cannot be cracked".
See the key below

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