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

Sentence: 'a building has a clock on the top of it'. Replace the letter 'l' with 'x' in the sentence.
a buixding has a cxock on the top of it

Sentence: 'a man and a child skiing down a mountain on a trail'. Replace the letter 'n' with 'm' in the sentence.
a mam amd a child skiimg dowm a moumtaim om a trail

Sentence: 'a bathroom with a toilet and tub inside of it'. Replace the letter 'a' with 'l' in the sentence.

l blthroom with l toilet lnd tub inside of it