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

Ex Input:
Sentence: 'a shot looks down on a person riding a long board'. Replace the letter 'o' with 'u' in the sentence.

Ex Output:
a shut luuks duwn un a persun riding a lung buard

Ex Input:
Sentence: 'a woman holding the arm of a life size teddy bear in a guard outfit'. Replace the letter 'g' with 'a' in the sentence.

Ex Output:
a woman holdina the arm of a life size teddy bear in a auard outfit

Ex Input:
Sentence: 'a cream colored puppy resting its head on a pillow'. Replace the letter 'a' with 'l' in the sentence.

Ex Output:
l crelm colored puppy resting its held on l pillow