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:
1, 1, ['N', 'J']
answer:
N


question:
30, 30, ['7149', 't', 'W', '5821', '1189', '4423', 'T', 'x', '5131', '9015', 'H', 'k', 'J', '9951', '5697', '1953', 'X', '8691', '3581', '7319', '6977', '8031', '6179', '2109', 'F', 'Y', 'G', '1065', 'y', '869']
answer:
968


question:
7, 24, ['D', '7715', 'm', 'n', '2681', 'E', 'W', '4661', 'o', 'S', '8353', '6455', '5825', '5115', 'g', '2627', '9469', '2043', '3097', 'e', '2837', 'v', '555', '2149', '6803']
answer:

9412555v7382e7903340296497262g5115528555463538So1664W