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

Ex Input:
Sentence: 'a giraffe sticks its tongue out in the air'. Replace the letter 'e' with 'l' in the sentence.

Ex Output:
a giraffl sticks its tongul out in thl air


Ex Input:
Sentence: 'a couple of giraffe standing next to each other near  a fence'. Replace the letter 'f' with 'j' in the sentence.

Ex Output:
a couple oj girajje standing next to each other near  a jence


Ex Input:
Sentence: 'a small little room that has a bed and a chair in it'. Replace the letter 'h' with 's' in the sentence.

Ex Output:

a small little room tsat sas a bed and a csair in it