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

[EX Q]: Sentence: 'a skater looks ahead as he rides down a ramp'. Replace the letter 'n' with 'm' in the sentence.
[EX A]: a skater looks ahead as he rides dowm a ramp

[EX Q]: Sentence: 'some brown black and white horses clouds and rocks'. Replace the letter 'a' with 'n' in the sentence.
[EX A]: some brown blnck nnd white horses clouds nnd rocks

[EX Q]: Sentence: 'an old stone wall with a large tower on top'. Replace the letter 'l' with 'y' in the sentence.
[EX A]:
an oyd stone wayy with a yarge tower on top