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: 1, 18, ['8949', '3721', 'r', '4035', 'v', '1501', '71', 'o', 'p', 's', 's', '5143', 'h', 'E', 'M', 'B', '6203', 'P', '7785']

89493721r4035v150171opss5143hEMB6203P