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

Ex Input:
Sentence: 'a table with three different plates and several drinks on it'. Replace the letter 't' with 'x' in the sentence.

Ex Output:
a xable wixh xhree differenx plaxes and several drinks on ix

Ex Input:
Sentence: 'an umbrella sitting on top of a hill next to a body of water'. Replace the letter 't' with 'b' in the sentence.

Ex Output:
an umbrella sibbing on bop of a hill nexb bo a body of waber

Ex Input:
Sentence: 'there is a man about to hit a baseball'. Replace the letter 'a' with 'm' in the sentence.

Ex Output:
there is m mmn mbout to hit m bmsebmll