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

[EX Q]: Sentence: 'an overhead view of a city cross walk on a rainy day features an array of colorful umbrellas'. Replace the letter 's' with 'd' in the sentence.
[EX A]: an overhead view of a city crodd walk on a rainy day featured an array of colorful umbrellad

[EX Q]: Sentence: 'a close shot of a stop sign near a building'. Replace the letter 'b' with 'u' in the sentence.
[EX A]: a close shot of a stop sign near a uuilding

[EX Q]: Sentence: 'several sail boats docked on a sandy beach'. Replace the letter 'b' with 'f' in the sentence.
[EX A]:
several sail foats docked on a sandy feach