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

Sentence: 'a busy intersection with cars moving at night'. Replace the letter 's' with 'f' in the sentence.
a bufy interfection with carf moving at night

Sentence: 'a person holding a green cell phone in a classroom with many desks'. Replace the letter 'k' with 'w' in the sentence.
a person holding a green cell phone in a classroom with many desws

Sentence: 'four small sail boats are in the water near swimming birds'. Replace the letter 't' with 'i' in the sentence.

four small sail boais are in ihe waier near swimming birds