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

Ex Input:
Sentence: 'a large elephant that has people all around it'. Replace the letter 'h' with 'm' in the sentence.

Ex Output:
a large elepmant tmat mas people all around it


Ex Input:
Sentence: 'a young boy riding his skateboard down the sidewalk'. Replace the letter 'd' with 'p' in the sentence.

Ex Output:
a young boy riping his skateboarp pown the sipewalk


Ex Input:
Sentence: 'a teddy bear sitting on a wooden porch'. Replace the letter 't' with 'y' in the sentence.

Ex Output:

a yeddy bear siyying on a wooden porch