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

Sentence: 'three young school girls waiting on a subway train platform'. Replace the letter 't' with 'o' in the sentence.
ohree young school girls waioing on a subway orain plaoform

Sentence: 'a yellow fire hydrant sitting on the sidewalk'. Replace the letter 'o' with 'd' in the sentence.
a yelldw fire hydrant sitting dn the sidewalk

Sentence: 'a close up shot of a computer keyboard'. Replace the letter 't' with 'f' in the sentence.

a close up shof of a compufer keyboard