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

Ex Input:
Sentence: 'a black cat is sniffing a glass bottle'. Replace the letter 'c' with 'f' in the sentence.

Ex Output:
a blafk fat is sniffing a glass bottle

Ex Input:
Sentence: 'a toilet that is being worked on with its seat removed'. Replace the letter 't' with 'p' in the sentence.

Ex Output:
a poilep phap is being worked on wiph ips seap removed

Ex Input:
Sentence: 'a blue seat in the back of a bus with a painted above it'. Replace the letter 'h' with 't' in the sentence.

Ex Output:
a blue seat in tte back of a bus witt a painted above it