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

Input: Consider Input: Sentence: 'a dog laying in front of a horses stall with the horse peeking over the half door'. Replace the letter 'a' with 'b' in the sentence.

Output: b dog lbying in front of b horses stbll with the horse peeking over the hblf door


Input: Consider Input: Sentence: 'red helicopter with landing wheels flying in the sky'. Replace the letter 'h' with 'y' in the sentence.

Output: red yelicopter wity landing wyeels flying in tye sky


Input: Consider Input: Sentence: 'you are never to old to play with the nintendo wii'. Replace the letter 'e' with 'v' in the sentence.


Output: you arv nvvvr to old to play with thv nintvndo wii