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

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

Sentence: 'a toilet and a microwave sitting out for the trash'. Replace the letter 'i' with 's' in the sentence.
a toslet and a mscrowave ssttsng out for the trash

Sentence: 'two people sitting on a bench sharing an open umbrella'. Replace the letter 'o' with 'r' in the sentence.
twr perple sitting rn a bench sharing an rpen umbrella