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

Ex Input:
Sentence: 'a crowd looking at a trio of planes that are sitting idle'. Replace the letter 'a' with 'e' in the sentence.

Ex Output:
e crowd looking et e trio of plenes thet ere sitting idle


Ex Input:
Sentence: 'a small child reaching back with a wii remote'. Replace the letter 'l' with 'o' in the sentence.

Ex Output:
a smaoo chiod reaching back with a wii remote


Ex Input:
Sentence: 'a  man standing on the side of a street holding a piece of luggage'. Replace the letter 'n' with 'v' in the sentence.

Ex Output:

a  mav stavdivg ov the side of a street holdivg a piece of luggage