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

Ex Input:
Sentence: 'a pair of planes in an airport lot parked for boarding and exiting'. Replace the letter 'e' with 'o' in the sentence.

Ex Output:
a pair of planos in an airport lot parkod for boarding and oxiting

Ex Input:
Sentence: 'a man who is surfing in a wave in the ocean'. Replace the letter 'a' with 'u' in the sentence.

Ex Output:
u mun who is surfing in u wuve in the oceun

Ex Input:
Sentence: 'a man in baseball uniform swinging a bat at a ball'. Replace the letter 't' with 'd' in the sentence.

Ex Output:
a man in baseball uniform swinging a bad ad a ball