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:
19, 23, ['r', '521', '2357', 'j', 'R', 'a', '4853', 'q', '2383', 'i', '8071', '3715', '7533', '1407', 'e', '9495', 'k', '3789', 'P', 'c', '2565', 'q', '4565', 'P']
answer:
5654q5652cP


question:
10, 27, ['z', '7203', 'd', '1795', '45', '1803', 'L', '2839', '6285', 'W', '1969', 'x', '6565', '8849', '6091', 'M', '7925', '37', 'h', '381', '59', 'O', '3283', 'u', '9831', 'Y', '5701', '7249', 'w']
answer:
1075Y1389u3823O95183h735297M190694885656x9691W


question:
18, 29, ['1427', 'D', '9629', 'n', 'G', '6627', '423', 'V', 'H', '9941', '1789', 'c', 'n', 'o', 'z', 'F', 's', 'f', 'R', '7083', 'g', '8901', 'j', 'l', '8729', 'd', '4569', '741', '5481']
answer:

18451479654d9278lj1098g3807Rf