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: 21, 29, ['2621', '3155', 'D', '6121', '1643', 'C', '6341', '9263', 'I', '2407', '5759', 'y', '35', '1515', 'G', '6881', 'z', 'E', 'Q', 'Z', '3197', '2777', 'd', '9597', 'O', 'c', '9595', '1607', '8483', '8143']

31972777d9597Oc959516078483