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

[EX Q]: Sentence: 'a long green grain traveling past a white building'. Replace the letter 'w' with 'o' in the sentence.
[EX A]: a long green grain traveling past a ohite building

[EX Q]: Sentence: 'a giraffe looking over a fence and another reaching over the fence'. Replace the letter 'l' with 'h' in the sentence.
[EX A]: a giraffe hooking over a fence and another reaching over the fence

[EX Q]: Sentence: 'giraffes behind a fence in the trees'. Replace the letter 'h' with 'l' in the sentence.
[EX A]:
giraffes belind a fence in tle trees