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

Ex Input:
Sentence: 'a person is looking out of a large window'. Replace the letter 'o' with 'p' in the sentence.

Ex Output:
a perspn is lppking put pf a large windpw


Ex Input:
Sentence: 'a group of young adults are engaged in outdoor exercise'. Replace the letter 'g' with 'n' in the sentence.

Ex Output:
a nroup of younn adults are ennaned in outdoor exercise


Ex Input:
Sentence: 'a large plane on a landing strip surrounded by workers'. Replace the letter 'i' with 'u' in the sentence.

Ex Output:

a large plane on a landung strup surrounded by workers