instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'a skater looks ahead as he rides down a ramp'. Replace the letter 'n' with 'm' in the sentence.
answer:
a skater looks ahead as he rides dowm a ramp

question:
Sentence: 'two children who are standing next to a white fire hydrant'. Replace the letter 't' with 'r' in the sentence.
answer:
rwo children who are sranding nexr ro a whire fire hydranr

question:
Sentence: 'a man riding skis on top of a snow covered slope'. Replace the letter 'p' with 'i' in the sentence.
answer:
a man riding skis on toi of a snow covered sloie