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

Ex Input:
Sentence: 'a man standing on a tennis court holding a tennis racquet'. Replace the letter 'c' with 'y' in the sentence.

Ex Output:
a man standing on a tennis yourt holding a tennis rayquet


Ex Input:
Sentence: 'a man on the news, watched on the television'. Replace the letter 'o' with 'z' in the sentence.

Ex Output:
a man zn the news, watched zn the televisizn


Ex Input:
Sentence: 'some zebras hanging out with a big and little giraffe'. Replace the letter 'n' with 'y' in the sentence.

Ex Output:

some zebras haygiyg out with a big ayd little giraffe