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

Sentence: 'many street signs in front of a building while it is snowing'. Replace the letter 'r' with 'x' in the sentence.
many stxeet signs in fxont of a building while it is snowing

Sentence: 'a street side tree is filled with candles, teddy bears and balloons'. Replace the letter 'e' with 'c' in the sentence.
a strcct sidc trcc is fillcd with candlcs, tcddy bcars and balloons

Sentence: 'a couple of women in sun hats resting on a bench'. Replace the letter 'o' with 'r' in the sentence.

a cruple rf wrmen in sun hats resting rn a bench