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

Sentence: 'a photo of a river with a train bridge across it'. Replace the letter 'r' with 'f' in the sentence.
a photo of a fivef with a tfain bfidge acfoss it

Sentence: 'there is a purse on the floor with its contents spilled out'. Replace the letter 'd' with 'v' in the sentence.
there is a purse on the floor with its contents spillev out

Sentence: 'an historic train car parked on the tracks at a rail station'. Replace the letter 'r' with 'l' in the sentence.

an histolic tlain cal palked on the tlacks at a lail station