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

Ex Input:
Sentence: 'giraffe standing on a pile of rocks reaching up to a branch with its mouth'. Replace the letter 'g' with 'n' in the sentence.

Ex Output:
niraffe standinn on a pile of rocks reachinn up to a branch with its mouth


Ex Input:
Sentence: 'lose up of various trays of croissants and muffins'. Replace the letter 'n' with 'f' in the sentence.

Ex Output:
lose up of various trays of croissafts afd muffifs


Ex Input:
Sentence: 'young toddler in striped onesy playing on a skate board'. Replace the letter 'y' with 'w' in the sentence.

Ex Output:

woung toddler in striped onesw plawing on a skate board