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

Ex Input:
Sentence: 'a giraffe leaning over a fence from inside it's pasture'. Replace the letter 'n' with 'l' in the sentence.

Ex Output:
a giraffe lealilg over a felce from ilside it's pasture

Ex Input:
Sentence: 'a large orange cat sits in a chair outside'. Replace the letter 'e' with 'x' in the sentence.

Ex Output:
a largx orangx cat sits in a chair outsidx

Ex Input:
Sentence: 'two tennis players are doubled in their pursuit of the two tennis balls'. Replace the letter 'p' with 'd' in the sentence.

Ex Output:
two tennis dlayers are doubled in their dursuit of the two tennis balls