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

Input: Consider Input: Sentence: 'a photo of a river with a train bridge across it'. Replace the letter 'r' with 'f' in the sentence.

Output: a photo of a fivef with a tfain bfidge acfoss it

Input: Consider Input: Sentence: 'a safari setting at a zoo with two giraffes and a zebra'. Replace the letter 'n' with 'g' in the sentence.

Output: a safari settigg at a zoo with two giraffes agd a zebra

Input: Consider Input: Sentence: 'he is making a meal on the boat and the man behind is getting out chopsticks and the other one is sitting'. Replace the letter 'e' with 'j' in the sentence.
Output: hj is making a mjal on thj boat and thj man bjhind is gjtting out chopsticks and thj othjr onj is sitting