TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a woman is playing tennis on the tennis court'. Replace the letter 'r' with 'z' in the sentence.

SOLUTION: a woman is playing tennis on the tennis couzt

PROBLEM: Sentence: 'a person is looking out of a large window'. Replace the letter 'o' with 'p' in the sentence.

SOLUTION: a perspn is lppking put pf a large windpw

PROBLEM: Sentence: 'train cars sit on the tracks next to a platform'. Replace the letter 'l' with 't' in the sentence.

SOLUTION:
train cars sit on the tracks next to a ptatform