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

Input: Consider Input: Sentence: 'young boy leaping into air with tennis racket with dog below him'. Replace the letter 't' with 'r' in the sentence.

Output: young boy leaping inro air wirh rennis racker wirh dog below him

Input: Consider Input: Sentence: 'little tubs of rice and mixed vegetables for a meal'. Replace the letter 't' with 'z' in the sentence.

Output: lizzle zubs of rice and mixed vegezables for a meal

Input: Consider Input: Sentence: 'a public official helping to feed some school children a healthy lunch'. Replace the letter 'i' with 't' in the sentence.
Output: a publtc offtctal helptng to feed some school chtldren a healthy lunch