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

Ex Input:
Sentence: 'a couple of kids with rackets on a court'. Replace the letter 'u' with 'd' in the sentence.

Ex Output:
a codple of kids with rackets on a codrt


Ex Input:
Sentence: 'a book shelf full of books and nick nacks '. Replace the letter 'o' with 'm' in the sentence.

Ex Output:
a bmmk shelf full mf bmmks and nick nacks 


Ex Input:
Sentence: 'grey cat sitting on the ground looking in the direction of a television control'. Replace the letter 'i' with 'w' in the sentence.

Ex Output:

grey cat swttwng on the ground lookwng wn the dwrectwon of a televwswon control