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

[EX Q]: Sentence: 'the big sandwich features several different  colorful ingredients'. Replace the letter 'e' with 'o' in the sentence.
[EX A]: tho big sandwich foaturos sovoral difforont  colorful ingrodionts

[EX Q]: Sentence: 'a couple walking down a sidewalk next to some graffiti'. Replace the letter 'a' with 'y' in the sentence.
[EX A]: y couple wylking down y sidewylk next to some gryffiti

[EX Q]: Sentence: 'a man is standing at the back of a box truck'. Replace the letter 'a' with 'y' in the sentence.
[EX A]:
y myn is stynding yt the byck of y box truck