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

Input: Consider Input: Sentence: 'a book shelf full of books and nick nacks '. Replace the letter 'o' with 'm' in the sentence.

Output: a bmmk shelf full mf bmmks and nick nacks 


Input: Consider Input: Sentence: 'a bathroom with a tub connected to a pool with some sinks inside'. Replace the letter 'e' with 'b' in the sentence.

Output: a bathroom with a tub connbctbd to a pool with somb sinks insidb


Input: Consider Input: Sentence: 'the fixings of a banana treat with a completely made one in the background'. Replace the letter 'h' with 'v' in the sentence.


Output: tve fixings of a banana treat witv a completely made one in tve background