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

Ex Input:
Sentence: 'nine geese flying south for the winter months'. Replace the letter 't' with 'f' in the sentence.

Ex Output:
nine geese flying soufh for fhe winfer monfhs


Ex Input:
Sentence: 'two girls holding blue umbrellas wearing shirts and plastic'. Replace the letter 'd' with 'y' in the sentence.

Ex Output:
two girls holying blue umbrellas wearing shirts any plastic


Ex Input:
Sentence: 'a young woman is pulling a casserole out of the oven'. Replace the letter 'v' with 'h' in the sentence.

Ex Output:

a young woman is pulling a casserole out of the ohen