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: 17, 21, ['8251', '4719', '2137', 'H', 'g', '5847', '2503', '8821', '8445', '9847', 'S', 'n', '909', 'x', '5185', '4915', 'Z', 'N', '3449', 'D', 'N', 'U', 'N']

ZN3449DN