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 bed with white comforter and two black stiletto heels'. Replace the letter 'h' with 's' in the sentence.

Ex Output:
a bed wits wsite comforter and two black stiletto seels


Ex Input:
Sentence: 'person with umbrella walking dog on snowy ground'. Replace the letter 'r' with 's' in the sentence.

Ex Output:

pesson with umbsella walking dog on snowy gsound