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

Ex Input:
Sentence: 'the people are in the library working and studying'. Replace the letter 'r' with 'g' in the sentence.

Ex Output:
the people age in the libgagy wogking and studying


Ex Input:
Sentence: 'a kitchen scene with a lot of items on the counters'. Replace the letter 't' with 'm' in the sentence.

Ex Output:
a kimchen scene wimh a lom of imems on mhe counmers


Ex Input:
Sentence: 'a giraffe looking at a safari truck driving past'. Replace the letter 'e' with 'h' in the sentence.

Ex Output:

a giraffh looking at a safari truck driving past