instruction:
In this task, you are given inputs 'i', 'j', and A, where 'i' and 'j' are integers and A is a list. A list is shown by two brackets and comma-separated numbers and characters inside, like ['1', '12', 'l']. You need to concatenate all elements of A from the ith element to the jth element, and then reverse the resulting 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'. Perform the operations in order, i.e., do not reverse first and then concatenate.
question:
4, 16, ['S', '5719', '173', 'P', 'a', '5791', 'e', '6279', 'q', '2585', '9533', 'r', '849', 'h', '3259', '3707', '4939', 'X', 'e']
answer:
70739523h948r33595852q9726e1975aP


question:
1, 3, ['o', 'o', '4511', '9203', '6071', 'Q', '5337']
answer:
1154oo


question:
12, 23, ['o', '4559', '7877', '9171', '7937', '5485', '7211', 'w', '9515', '7237', 'o', '7133', 'B', '1879', 'W', '8141', 'K', '6137', '8009', '6709', 'g', '3289', '2093', '991', '5055', 'q']
answer:

39029823g907690087316K1418W9781B3317