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

Ex Input:
Sentence: 'a safari setting at a zoo with two giraffes and a zebra'. Replace the letter 'n' with 'g' in the sentence.

Ex Output:
a safari settigg at a zoo with two giraffes agd a zebra


Ex Input:
Sentence: 'a woman holding a tennis racket getting ready to hit a tennis ball'. Replace the letter 'r' with 'l' in the sentence.

Ex Output:
a woman holding a tennis lacket getting leady to hit a tennis ball


Ex Input:
Sentence: 'three giraffes in the wild standing near a large tree'. Replace the letter 's' with 'g' in the sentence.

Ex Output:

three giraffeg in the wild gtanding near a large tree