In this task, you need to replace a letter in the sentence with another given letter.
--------
Question: Sentence: 'a crowd watches as giraffes graze the tree tops at the zoo'. Replace the letter 't' with 'q' in the sentence.

Answer: a crowd waqches as giraffes graze qhe qree qops aq qhe zoo


Question: Sentence: 'there are people camping and flying kites in a field'. Replace the letter 't' with 'j' in the sentence.

Answer: jhere are people camping and flying kijes in a field


Question: Sentence: 'a man sitting on a surf board out in the water'. Replace the letter 'i' with 'y' in the sentence.

Answer:
a man syttyng on a surf board out yn the water