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

Sentence: 'two men and a dog are standing beside a building'. Replace the letter 'b' with 'y' in the sentence.
two men and a dog are standing yeside a yuilding

Sentence: 'two tennis players shaking hands over the net'. Replace the letter 'n' with 'f' in the sentence.
two teffis players shakifg hafds over the fet

Sentence: 'a large gray elephant standing in a forest'. Replace the letter 'd' with 'o' in the sentence.

a large gray elephant stanoing in a forest