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

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

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


Input: Consider Input: Sentence: 'a person and a dog are on a bench'. Replace the letter 'e' with 'r' in the sentence.

Output: a prrson and a dog arr on a brnch


Input: Consider Input: Sentence: 'the bright sunlight shines on a small group of giraffes, one that looks like the mother of the other two'. Replace the letter 't' with 'r' in the sentence.


Output: rhe brighr sunlighr shines on a small group of giraffes, one rhar looks like rhe morher of rhe orher rwo