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:
9, 25, ['u', 'b', '4819', 'm', 'm', '1651', 'H', 'O', '481', 'I', 'g', '8861', 'b', '2641', 'D', '5411', '7731', 'I', '257', 'I', '2055', '5441', '7079', 'D', '93', '6783']
answer:
39D970714455502I752I13771145D1462b1688gI184


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


question:
12, 20, ['q', 'q', 'z', 'e', 'Y', 'L', 'M', '3251', 'w', '3239', '8769', 'L', '9917', 'L', 'T', 'I', 'Q', 'I', 'T', '3223', '3395', 'W', 'D']
answer:

3223TIQITL7199L