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

Ex Input:
Sentence: 'a group of sheep is standing in a grassy field'. Replace the letter 'g' with 'p' in the sentence.

Ex Output:
a proup of sheep is standinp in a prassy field

Ex Input:
Sentence: 'a man that is throwing a frizbee in the woods'. Replace the letter 'g' with 'u' in the sentence.

Ex Output:
a man that is throwinu a frizbee in the woods

Ex Input:
Sentence: 'broccoli just beginning to bud open and blossom'. Replace the letter 'o' with 'g' in the sentence.

Ex Output:
brgccgli just beginning tg bud gpen and blgssgm