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

Ex Input:
Sentence: 'a man walking his dog near a sandy area'. Replace the letter 'i' with 'g' in the sentence.

Ex Output:
a man walkgng hgs dog near a sandy area


Ex Input:
Sentence: 'a memorial with various plaques and american flags on it'. Replace the letter 'a' with 'k' in the sentence.

Ex Output:
k memorikl with vkrious plkques knd kmerickn flkgs on it


Ex Input:
Sentence: 'a photo of a vegetable entree with brocolli and sauce'. Replace the letter 'a' with 'y' in the sentence.

Ex Output:

y photo of y vegetyble entree with brocolli ynd syuce