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, 21, ['f', '3237', '6559', '9539', '4521', '4809', '8205', 'B', 'V', '9529', 'X', 'E', 'l', '7431', '8893', 'a', 'O', '8599', '8135', 'K', 'i', '8061', '2409', 'v', '1739', 'q']

65599539452148098205BV9529XEl74318893aO85998135Ki