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

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

Ex Output:
a baneball player nwinging a bat at a ball

Ex Input:
Sentence: 'a person snow skiing down a hill while the hold their ski poles'. Replace the letter 'r' with 'g' in the sentence.

Ex Output:
a pegson snow skiing down a hill while the hold theig ski poles

Ex Input:
Sentence: 'a woman is standing in front of a stove in a kitchen'. Replace the letter 'w' with 'c' in the sentence.

Ex Output:
a coman is standing in front of a stove in a kitchen