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

Ex Input:
Sentence: 'two children who are standing next to a white fire hydrant'. Replace the letter 't' with 'r' in the sentence.

Ex Output:
rwo children who are sranding nexr ro a whire fire hydranr


Ex Input:
Sentence: 'a spacious bedroom with tidy bed and sofa with cushions'. Replace the letter 'n' with 'c' in the sentence.

Ex Output:
a spacious bedroom with tidy bed acd sofa with cushiocs


Ex Input:
Sentence: 'a tow truck has brought a small car into a busy shop'. Replace the letter 'u' with 'p' in the sentence.

Ex Output:

a tow trpck has bropght a small car into a bpsy shop