TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a man extends his arm with a frisbee in hand as another reaches to grab it while teammates watch'. Replace the letter 'a' with 'g' in the sentence.

SOLUTION: g mgn extends his grm with g frisbee in hgnd gs gnother regches to grgb it while tegmmgtes wgtch

PROBLEM: Sentence: 'a couple of brown bears walking across a lush green field'. Replace the letter 'w' with 'o' in the sentence.

SOLUTION: a couple of broon bears oalking across a lush green field

PROBLEM: Sentence: 'a woman in a coat outside brushing her hair'. Replace the letter 'o' with 'm' in the sentence.

SOLUTION:
a wmman in a cmat mutside brushing her hair