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: 1, 2, ['e', 'F']

Answer: Fe


Question: 1, 2, ['A', '8103', '7829']

Answer: 3018A


Question: 2, 13, ['B', 'X', 'Z', 'K', 'E', 'U', 'j', '4937', '2557', '9755', 'r', '5965', '6421', 'g', 'Z']

Answer:
12465695r557975527394jUEKZX