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

Ex Input:
Sentence: 'a baseball player is throwing a ball across the dirt field'. Replace the letter 'a' with 't' in the sentence.

Ex Output:
t btsebtll pltyer is throwing t btll tcross the dirt field


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 baseball player reaching for a baseball in the outfield'. Replace the letter 'e' with 'h' in the sentence.

Ex Output:

a bashball playhr rhaching for a bashball in thh outfihld