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: 14, 21, ['c', 'P', 'o', 'Y', 'b', '6201', 'B', '5763', '617', 'q', '4675', '6043', 'B', '4271', '3073', '2873', '5943', 'W', 'p', '3771', 'v', 'e', 'J', 'c', 'C', '7311']

4271307328735943Wp3771v