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

Ex Input:
Sentence: 'lots of luggage is jammed into the back compartment of a van'. Replace the letter 'o' with 'h' in the sentence.

Ex Output:
lhts hf luggage is jammed inth the back chmpartment hf a van


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 person on a snow board flying through the air'. Replace the letter 'f' with 'n' in the sentence.

Ex Output:

a person on a snow board nlying through the air