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: 10, 20, ['4617', 'A', '8437', '8585', '9481', '7015', '3141', 'm', 'U', '4997', 'f', '707', 'E', '9533', 'u', '8585', '1051', '1521', 'o', '3873', '8053', '9589']

4997f707E9533u858510511521o3873