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

Ex Input:
Sentence: 'a hipster riding a skateboard up the side of a wall'. Replace the letter 's' with 'm' in the sentence.

Ex Output:
a hipmter riding a mkateboard up the mide of a wall


Ex Input:
Sentence: 'a laptop computer attached to a large monitor'. Replace the letter 'a' with 'r' in the sentence.

Ex Output:
r lrptop computer rttrched to r lrrge monitor


Ex Input:
Sentence: 'a man with a black backpack drinking wine with a lady'. Replace the letter 'a' with 'g' in the sentence.

Ex Output:

g mgn with g blgck bgckpgck drinking wine with g lgdy