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

Ex Input:
Sentence: 'a man on a horse in riding gear looking onward'. Replace the letter 'o' with 'h' in the sentence.

Ex Output:
a man hn a hhrse in riding gear lhhking hnward


Ex Input:
Sentence: 'a man swinging at a tennis with a racquet on a court'. Replace the letter 't' with 'c' in the sentence.

Ex Output:
a man swinging ac a cennis wich a racquec on a courc


Ex Input:
Sentence: 'a two tier bus stopped at a street while passengers get on'. Replace the letter 's' with 'p' in the sentence.

Ex Output:

a two tier bup ptopped at a ptreet while pappengerp get on