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: 3, 14, ['z', '1049', 'K', '3243', 'r', '7893', '2621', 'c', 'W', '2731', 'X', 'T', '5779', 'Z', 'R', 'k', '8493', '5469', 'W']

K3243r78932621cW2731XT5779Z