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

Sentence: 'a boy on the beach playing with a frisbee'. Replace the letter 'h' with 'e' in the sentence.
a boy on tee beace playing wite a frisbee

Sentence: 'a skier in the midst of a jump'. Replace the letter 'm' with 'd' in the sentence.
a skier in the didst of a judp

Sentence: 'a herd of gazelle standing around a zebra'. Replace the letter 'z' with 'k' in the sentence.

a herd of gakelle standing around a kebra