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

Sentence: 'a tennis player throwing a ball at the ground'. Replace the letter 'r' with 'f' in the sentence.
a tennis playef thfowing a ball at the gfound

Sentence: 'a group of people hanging around holding umbrellas'. Replace the letter 'p' with 'f' in the sentence.
a grouf of feofle hanging around holding umbrellas

Sentence: 'a woman holding a kid is walking down the street with an umbrella'. Replace the letter 'n' with 'o' in the sentence.

a womao holdiog a kid is walkiog dowo the street with ao umbrella