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, 12, ['f', '8665', '6205', 'L', 'y', 'P', '9351', 'k', '1387', '657', 's', 'k']

Answer: ks7567831k1539PyL50265668f


Question: 1, 2, ['4211', '3035', '3071', '3941', 'D', '1851']

Answer: 53031124


Question: 11, 13, ['1251', '5387', 'U', 'I', '2905', '3387', '1071', 'p', '1305', 'Q', '3973', '4971', 'E', '4455']

Answer:
E17943793