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: 12, 21, ['D', 'D', '8189', '4231', 'f', 'e', 'g', 'Y', 'R', 'm', '1857', 'k', '9221', '1339', '5317', 'C', 'I', 'R', '3451', '5491', 'Q', 'e', 'K', 'k', 'V', '9435']

k922113395317CIR34515491Q