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, 9, ['g', '3007', '4827', '6665', '711', '6997', '137', 'X', '7383', 'q', 'v', 'K', '267', '3691', 'G', '7925', '8327', 'l']
answer:
3837X7317996117566672847003g


question:
2, 3, ['5191', '9077', 'a']
answer:
a7709


question:
5, 9, ['W', 'S', 'o', '8323', 'f', 'D', '5061', 'h', 'H', '2199', '6377', '1821', 'K', 'J', 'p', 'n', '1377', 'M', 'T', '5591', '31', '7429', 'n', 'U']
answer:

Hh1605Df