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

Ex Input:
Sentence: 'a plate topped with waffles, bacon and banana slices'. Replace the letter 'a' with 'k' in the sentence.

Ex Output:
k plkte topped with wkffles, bkcon knd bknknk slices


Ex Input:
Sentence: 'a train traveling through a dark tunnel next to green brush.'. Replace the letter 'r' with 'e' in the sentence.

Ex Output:
a teain teaveling theough a daek tunnel next to geeen beush.


Ex Input:
Sentence: 'the blue white bus sign next to the trees on the campus'. Replace the letter 'e' with 'p' in the sentence.

Ex Output:

thp blup whitp bus sign npxt to thp trpps on thp campus