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

Example Input: Sentence: 'a baseball player swinging a bat at a ball'. Replace the letter 's' with 'n' in the sentence.
Example Output: a baneball player nwinging a bat at a ball

Example Input: Sentence: 'it pays a cat to be suspicious of what your owner tries to feed you'. Replace the letter 'o' with 'g' in the sentence.
Example Output: it pays a cat tg be suspicigus gf what ygur gwner tries tg feed ygu

Example Input: Sentence: 'a man excited about a display of pink frosted donuts'. Replace the letter 'a' with 'c' in the sentence.
Example Output:
c mcn excited cbout c displcy of pink frosted donuts