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: 5, 21, ['9055', '8993', '6591', 'U', 'g', '8745', 'L', 'k', 'k', '3671', 'b', 'B', '2859', 'k', 'g', '4151', 'G', 'C', '3843', '2649', '1023']

g8745Lkk3671bB2859kg4151GC384326491023