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

Ex Input:
Sentence: 'a couple of giraffe standing next to each other near  a fence'. Replace the letter 'f' with 'j' in the sentence.

Ex Output:
a couple oj girajje standing next to each other near  a jence


Ex Input:
Sentence: 'a baseball player swinging a bat at a ball'. Replace the letter 's' with 'n' in the sentence.

Ex Output:
a baneball player nwinging a bat at a ball


Ex Input:
Sentence: 'several people, including a small boy in blue shorts, are on a grassy area while a woman holds a red kite that flies just over the little boy's head'. Replace the letter 's' with 'q' in the sentence.

Ex Output:

qeveral people, including a qmall boy in blue qhortq, are on a graqqy area while a woman holdq a red kite that flieq juqt over the little boy'q head