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: 3, 15, ['B', '4815', 'Z', '6381', '5197', 'a', 'A', 'p', 'M', '2571', 'e', '9847', 'H', 'R', '8553', '2417', 'w', 'u']

Z63815197aApM2571e9847HR8553