TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'giraffes behind a fence in the trees'. Replace the letter 'h' with 'l' in the sentence.

SOLUTION: giraffes belind a fence in tle trees

PROBLEM: Sentence: 'a crowd looking at a trio of planes that are sitting idle'. Replace the letter 'a' with 'e' in the sentence.

SOLUTION: e crowd looking et e trio of plenes thet ere sitting idle

PROBLEM: Sentence: 'a very large cheesy pizza sitting on top of a table'. Replace the letter 'b' with 'q' in the sentence.

SOLUTION:
a very large cheesy pizza sitting on top of a taqle