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

Ex Input:
Sentence: 'closeup of two teddy bears in red scarves and a brown teddy bear'. Replace the letter 'i' with 'y' in the sentence.

Ex Output:
closeup of two teddy bears yn red scarves and a brown teddy bear


Ex Input:
Sentence: 'a baseball game is in progress at a baseball stadium'. Replace the letter 's' with 'r' in the sentence.

Ex Output:
a bareball game ir in progrerr at a bareball rtadium


Ex Input:
Sentence: 'a city street at night with a clock tower in the back ground'. Replace the letter 'h' with 's' in the sentence.

Ex Output:

a city street at nigst wits a clock tower in tse back ground