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, 18, ['h', 'c', 'J', 'C', '2371', '7267', 'T', 'W', '1277', 's', 'g', '4555', 'n', 'g', '1535', '4369', '9577', 'R', 'p', '7441', 'r', '3533', 'h', '1045', '2211', 'g', '6349', 'i', '9305', '5295']
answer:
R775996345351gn5554gs7721WT76271732CJch


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:
18, 23, ['T', 'V', 't', 'a', '7071', '5361', '2443', '5027', 'T', '7613', 'X', '4893', '8759', 'z', '7357', 'd', 'u', 'q', 'p', '4381', '8319', '6093', 't', '8529', 'a', '9131', 'W']
answer:

t390691381834pq