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: 4, 20, ['6141', '9745', '7899', 'c', '8887', 'e', '5857', '8393', '8489', '1689', '9231', 'j', '5419', 'b', 'D', '6331', '5095', 'r', '4651', 'g', 'x', 'W']

c8887e58578393848916899231j5419bD63315095r4651g