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

Ex Input:
Sentence: 'a motorcycle sitting on the side of the road by grass'. Replace the letter 'r' with 't' in the sentence.

Ex Output:
a mototcycle sitting on the side of the toad by gtass


Ex Input:
Sentence: 'street sign titled kittery maine state line in green'. Replace the letter 'e' with 'r' in the sentence.

Ex Output:
strrrt sign titlrd kittrry mainr statr linr in grrrn


Ex Input:
Sentence: 'two horses are nose to nose in a field'. Replace the letter 'h' with 'u' in the sentence.

Ex Output:

two uorses are nose to nose in a field