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

Sentence: 'a woman gives a thumbs up sign while sitting in front of a sandwich'. Replace the letter 's' with 'h' in the sentence.
a woman giveh a thumbh up hign while hitting in front of a handwich

Sentence: 'a box of a dozen doughnuts all varieties'. Replace the letter 'l' with 'i' in the sentence.
a box of a dozen doughnuts aii varieties

Sentence: 'two dogs survey the framing of a house addition'. Replace the letter 's' with 'k' in the sentence.
two dogk kurvey the framing of a houke addition