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.
--------
Question: 3, 6, ['3315', 't', 'B', 'K', '631', 'e', '3715', 'o', '2761', 'e', 'a', 'K', 'J', '6837']

Answer: BK631e


Question: 10, 20, ['L', 'Z', 'D', '7923', 'e', '9243', 'N', 'e', 'a', '5995', 'h', '2323', 'Q', '4075', '8675', '8713', 'i', 'k', 'B', 'm']

Answer: 5995h2323Q407586758713ikBm


Question: 1, 15, ['K', '917', '5293', 'a', '8211', 'J', 'u', 'K', 'l', '9937', '8119', '4219', '3447', 'o', 'T', '451', 'A', 'C', 'g', 'V', 'p', 'h', '5713']

Answer:
K9175293a8211JuKl9937811942193447oT