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

Input: Consider Input: Sentence: 'the dog lies inside a purple and white collapsable chair'. Replace the letter 'n' with 'j' in the sentence.

Output: the dog lies ijside a purple ajd white collapsable chair

Input: Consider Input: Sentence: 'a number of people sitting on chairs near each other'. Replace the letter 'c' with 'm' in the sentence.

Output: a number of people sitting on mhairs near eamh other

Input: Consider Input: Sentence: 'a person walking on the street holding an umbrella'. Replace the letter 'h' with 'd' in the sentence.
Output: a person walking on tde street dolding an umbrella