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

Sentence: 'a woman is standing on a street curb'. Replace the letter 'a' with 't' in the sentence.
t womtn is sttnding on t street curb

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 room with two couches and a television'. Replace the letter 'i' with 'e' in the sentence.

a room weth two couches and a televeseon