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

Ex Input:
Sentence: 'a young man playing tennis and preparing to hit the ball'. Replace the letter 'e' with 'c' in the sentence.

Ex Output:
a young man playing tcnnis and prcparing to hit thc ball


Ex Input:
Sentence: 'this is a man and boy holding skis'. Replace the letter 'h' with 'l' in the sentence.

Ex Output:
tlis is a man and boy lolding skis


Ex Input:
Sentence: 'a yellow sign that is on a sidewalk'. Replace the letter 'w' with 'h' in the sentence.

Ex Output:

a yelloh sign that is on a sidehalk