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

Sentence: 'a person flying a kite on the beach between some trees'. Replace the letter 's' with 'k' in the sentence.
a perkon flying a kite on the beach between kome treek

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 clear vase with several pretty yellow and red petaled flowers'. Replace the letter 'y' with 'k' in the sentence.
a clear vase with several prettk kellow and red petaled flowers