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

Input: Consider Input: Sentence: 'a kid is sitting on a skateboard outside'. Replace the letter 'd' with 'a' in the sentence.

Output: a kia is sitting on a skateboara outsiae


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: 'two little birds with white chests sit on barbed wire'. Replace the letter 'd' with 'k' in the sentence.


Output: two little birks with white chests sit on barbek wire