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

Ex Input:
Sentence: 'a horse in a country field with woods in the background'. Replace the letter 'a' with 'i' in the sentence.

Ex Output:
i horse in i country field with woods in the bickground


Ex Input:
Sentence: 'an old rusty car sits outside of an old building'. Replace the letter 'o' with 'r' in the sentence.

Ex Output:
an rld rusty car sits rutside rf an rld building


Ex Input:
Sentence: 'a person holding a snow board vertical in front of them a wooded snowy area'. Replace the letter 'a' with 'w' in the sentence.

Ex Output:

w person holding w snow bowrd verticwl in front of them w wooded snowy wrew