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, 15, ['b', '1351', 'c', 'g', 's', '3579', '5161', '3523', 'E', '3477', 'v', '2987', 'W', '9381', 'L', '8949', '5505', '1869', '5237', '699', 'v', 'N', 'u']

51613523E3477v2987W9381L