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: 13, 16, ['K', '463', '1613', 'K', 'M', 'i', 'I', '397', '3171', 's', '2739', '2033', '4637', 'H', '1909', 'A', 'D', '3987', 'f', '5253', '3157', '165', 'u']

4637H1909A