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

Example Input: Sentence: 'a man dressed in a knight costume riding a horse performing at a show'. Replace the letter 'e' with 'j' in the sentence.
Example Output: a man drjssjd in a knight costumj riding a horsj pjrforming at a show

Example Input: Sentence: 'a man in blazer holding a tie over his eyes'. Replace the letter 's' with 'e' in the sentence.
Example Output: a man in blazer holding a tie over hie eyee

Example Input: Sentence: 'a tennis player wearing white uniform reaching for ball'. Replace the letter 'r' with 'l' in the sentence.
Example Output:
a tennis playel wealing white unifolm leaching fol ball