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

Ex Input:
Sentence: 'a boy on the beach playing with a frisbee'. Replace the letter 'h' with 'e' in the sentence.

Ex Output:
a boy on tee beace playing wite a frisbee


Ex Input:
Sentence: 'a u.s. military helicopter landing or taking off'. Replace the letter 'i' with 'l' in the sentence.

Ex Output:
a u.s. mllltary hellcopter landlng or taklng off


Ex Input:
Sentence: 'a couple of black bears sitting and standing next to each other'. Replace the letter 'a' with 'e' in the sentence.

Ex Output:

e couple of bleck beers sitting end stending next to eech other