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

Sentence: 'a group of people riding skis on a snowy surface'. Replace the letter 'p' with 'i' in the sentence.
a groui of ieoile riding skis on a snowy surface

Sentence: 'a group of men and women sitting next to each other'. Replace the letter 'p' with 'l' in the sentence.
a groul of men and women sitting next to each other

Sentence: 'a group of military men cutting up a sheet cake'. Replace the letter 'c' with 'h' in the sentence.

a group of military men hutting up a sheet hake