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

Ex Input:
Sentence: 'a ski slope consisting of several people wearing skis and snowboards'. Replace the letter 'e' with 's' in the sentence.

Ex Output:
a ski slops consisting of ssvsral psopls wsaring skis and snowboards


Ex Input:
Sentence: 'a crooked street sign on a damaged sidewalk'. Replace the letter 'm' with 'u' in the sentence.

Ex Output:
a crooked street sign on a dauaged sidewalk


Ex Input:
Sentence: 'a passenger train speeding past an empty train stop'. Replace the letter 'p' with 'l' in the sentence.

Ex Output:

a lassenger train sleeding last an emlty train stol