ROT 31 decoder

[Shiwamisrie]

Hello I need a program to decode an ROT 31 string can anyone give me any suggestions?.

I thank you in advance, I have tried for 2 weeks without any progress

[cire]

I thank you in advance, I have tried for 2 weeks without any progress

All you've got to show for your 2 weeks of effort is the claim you've tried for 2 weeks? (And, presumably, you mean rot13.)