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: 15, 19, ['k', 'g', 'r', 'z', 'O', '5677', '9685', '9053', '2323', '7493', 'Z', 'h', '6875', 'u', '5307', 'V', '3949', 'r', '3891', '8559']

5307V3949r3891