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: 7, 20, ['F', '6517', '6293', 'n', 'd', '9333', 'H', 'E', '4019', '7579', 'u', '575', 'R', '4803', '367', 'K', 't', 'k', 'V', '3773', '1411', '7171', '2963', '6867', '6751', 'h']

HE40197579u575R4803367KtkV3773