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.
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Question: 6, 7, ['J', '701', 'm', '8837', 'b', 'd', '5911', 'y', '8031']

Answer: 1195d


Question: 1, 12, ['6893', 'o', '2661', 'T', 'w', 'u', 'k', '7727', 'X', '9861', '9125', 'o', 'x', '9109']

Answer: o52191689X7277kuwT1662o3986


Question: 16, 21, ['H', '9769', '5159', '7841', '8305', '5717', 'u', '6919', '3651', 'T', 'F', 'P', 'Y', '2493', '7403', 'f', 'M', '8911', 'u', 'r', 'w', '5473']

Answer:
wru1198Mf