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

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

Output: a perkon flying a kite on the beach  between kome treek


Input: Consider Input: Sentence: 'a crowd watches as giraffes graze the tree tops at the zoo'. Replace the letter 't' with 'q' in the sentence.

Output: a crowd waqches as giraffes graze qhe qree qops aq qhe zoo


Input: Consider Input: Sentence: 'a red trolley car is riding down the street next to trees in the middle of autumn'. Replace the letter 'r' with 'o' in the sentence.


Output: a oed toolley cao is oiding down the stoeet next to toees in the middle of autumn