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:
14, 17, ['J', '8303', 'I', 'O', 'Y', 'U', '9225', '5315', '8891', '5195', '5805', '8577', 'n', '3621', 'k', '4049', 'k', 'y', '9591', '3465', '9829']
answer:
k9404k1263


question:
3, 6, ['z', 'b', '2697', 'W', '1449', 'x', '5327']
answer:
x9441W7962


question:
3, 18, ['1717', 'Q', '8259', 'l', 'Z', '8655', '9041', 'M', 'm', '6517', 'L', '913', 'x', 'd', '5357', '9501', 's', '2423', '9121', '9343', '7189', '4451', 'j']
answer:

3242s10597535dx319L7156mM14095568Zl9528