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

Ex Input:
Sentence: 'a dirt bike rider that is riding in the mud'. Replace the letter 'a' with 'o' in the sentence.

Ex Output:
o dirt bike rider thot is riding in the mud

Ex Input:
Sentence: 'closeup of two teddy bears in red scarves and a brown teddy bear'. Replace the letter 'i' with 'y' in the sentence.

Ex Output:
closeup of two teddy bears yn red scarves and a brown teddy bear

Ex Input:
Sentence: 'an old boat is on the shore of a beach with nets, boxes, and other junk next to it and other beached boats in the background'. Replace the letter 't' with 'p' in the sentence.

Ex Output:
an old boap is on phe shore of a beach wiph neps, boxes, and opher junk nexp po ip and opher beached boaps in phe background