In this task, you need to replace a letter in the sentence with another given letter.

Ex Input:
Sentence: 'a gray elephant standing next to green bushes'. Replace the letter 'e' with 'o' in the sentence.

Ex Output:
a gray olophant standing noxt to groon bushos


Ex Input:
Sentence: 'a herd of black cattle grazing and lounging in a green field'. Replace the letter 'a' with 'q' in the sentence.

Ex Output:
q herd of blqck cqttle grqzing qnd lounging in q green field


Ex Input:
Sentence: 'a hand holding a hot dog at a baseball game'. Replace the letter 'o' with 'a' in the sentence.

Ex Output:

a hand halding a hat dag at a baseball game