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:
21, 24, ['t', '1315', '1977', '8701', 'w', '2899', '9389', 'c', 'F', '2949', '9591', 'Y', '3127', '5887', 'D', '6527', 'I', '3229', '6585', '5375', '6289', 'j', '1775', 'n', 'O', '4741']
answer:
n5771j9826


question:
2, 5, ['f', 'd', '2691', 't', 'u']
answer:
ut1962d


question:
11, 11, ['w', '2871', '2465', '4779', '9339', 'G', 'T', '8267', '3909', 'x', '637', '563', '8397', '8847', 'S', '2651', '9341', 'e', 'Y']
answer:

736