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

Sentence: 'a person on a surfboard riding in ocean waves'. Replace the letter 's' with 'g' in the sentence.
a pergon on a gurfboard riding in ocean waveg

Sentence: 'a man has his hand on top of a blender'. Replace the letter 'd' with 'o' in the sentence.
a man has his hano on top of a blenoer

Sentence: 'a prepared lunch sits on a tray, with sandwich and fries'. Replace the letter 'd' with 'p' in the sentence.

a preparep lunch sits on a tray, with sanpwich anp fries