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: 8, 15, ['s', 'T', '4017', '8893', '6099', 'j', '8015', 'Y', 'K', 'F', 'k', '5039', '5691', 'z', '3493', 'F', 'c', '9291', 'F']

YKFk50395691z3493