Definition: In this task, you are given inputs i,j, and A, where i and j are integers and A is a list. You need to concatenate all elements of A from the ith element to the jth element, and print the resultant string. i and j will be non-negative, and will always have a value less than the length of A. i will always be less than j.
Input: 3, 18, ['B', '1999', 'j', '4977', 'b', 'y', 'O', 'H', 'p', 'x', '4097', '1513', '7849', '9455', 's', '759', '2333', '6519', '6753', 'l', '4531', 'j']

j4977byOHpx4097151378499455s75923336519