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

Sentence: 'a u.s. military helicopter landing or taking off'. Replace the letter 'i' with 'l' in the sentence.
a u.s. mllltary hellcopter landlng or taklng off

Sentence: 'a child taking the paper off a box sitting on the floor'. Replace the letter 'c' with 'b' in the sentence.
a bhild taking the paper off a box sitting on the floor

Sentence: 'a group of men sitting at a table together'. Replace the letter 'e' with 'k' in the sentence.

a group of mkn sitting at a tablk togkthkr