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 man standing in the water flying a kite'. Replace the letter 'w' with 's' in the sentence.

Ex Output:
a man standing in the sater flying a kite


Ex Input:
Sentence: 'a man is riding a horse while going down the street'. Replace the letter 'g' with 'i' in the sentence.

Ex Output:

a man is ridini a horse while ioini down the street