Rewrite the sentence to change its mood from sad to cheerful: "He failed his exam again".
"He may have failed his exam again, but he won't give up and will keep trying until he gets it right!"
Complete the following task based on the instruction and optional input provided.### Instruction:
Rewrite the sentence to change its mood from sad to cheerful: "He failed his exam again".

### Output:
"He may have failed his exam again, but he won't give up and will keep trying until he gets it right!"