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

Sentence: 'lose up of various trays of croissants and muffins'. Replace the letter 'n' with 'f' in the sentence.
lose up of various trays of croissafts afd muffifs

Sentence: 'a baseball player holding a bat in front of catcher and umpire'. Replace the letter 'i' with 'k' in the sentence.
a baseball player holdkng a bat kn front of catcher and umpkre

Sentence: 'two small birds perched on tree branches together'. Replace the letter 't' with 'f' in the sentence.

fwo small birds perched on free branches fogefher