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:
2, 4, ['o', '5393', 'p', 'h', '5617', 'F', 'I', 'a']
answer:
hp3935


question:
6, 19, ['1247', 'w', '6657', '3757', '9313', 'u', '5655', 'n', '9559', '4017', '9041', 'n', 'w', '155', 'C', 'N', '6351', '9761', '5701', '3857', '6167', 'u']
answer:
107516791536NC551wn140971049559n5565u


question:
9, 17, ['c', 'b', '4317', '2651', 'A', 'p', 'Y', 'A', '4541', '693', 'Y', 'K', 'Z', '2495', '9631', '61', 'P', '8035', '9983', '6359', 'f', 'P', '3663']
answer:

P1613695942ZKY3961454