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

Input: Consider Input: Sentence: 'a shot looks down on a person riding a long board'. Replace the letter 'o' with 'u' in the sentence.

Output: a shut luuks duwn un a persun riding a lung buard


Input: Consider Input: Sentence: 'a basket holds flowers, twigs, and various fruits'. Replace the letter 'a' with 'g' in the sentence.

Output: g bgsket holds flowers, twigs, gnd vgrious fruits


Input: Consider Input: Sentence: 'several horses standing and lying down in a grassy field'. Replace the letter 'v' with 'e' in the sentence.


Output: seeeral horses standing and lying down in a grassy field