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

Ex Input:
Sentence: 'a painting of scissors going to cut a chain with a lock'. Replace the letter 'g' with 'v' in the sentence.

Ex Output:
a paintinv of scissors voinv to cut a chain with a lock


Ex Input:
Sentence: 'a plate with some mean and vegetables on it'. Replace the letter 'a' with 'f' in the sentence.

Ex Output:
f plfte with some mefn fnd vegetfbles on it


Ex Input:
Sentence: 'a yellow and black street sing on a sidewalk'. Replace the letter 'w' with 'r' in the sentence.

Ex Output:

a yellor and black street sing on a sideralk