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

Ex Input:
Sentence: 'a dog wearing a pink life jacket sitting on a surf board in the ocean'. Replace the letter 'c' with 'y' in the sentence.

Ex Output:
a dog wearing a pink life jayket sitting on a surf board in the oyean


Ex Input:
Sentence: 'the big sandwich features several different  colorful ingredients'. Replace the letter 'e' with 'o' in the sentence.

Ex Output:
tho big sandwich foaturos sovoral difforont  colorful ingrodionts


Ex Input:
Sentence: 'a motorcyclist is being followed by a familiar face'. Replace the letter 'o' with 'b' in the sentence.

Ex Output:

a mbtbrcyclist is being fbllbwed by a familiar face