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: 4, 9, ['6451', '9261', 's', '5587', 'D', '7595', 'D', 'E', 's', '8841', 'Y']

Answer: sED5957D7855


Question: 8, 10, ['f', 'F', '4775', 'F', 'w', 'r', 'v', 'S', 'N', '479', 'e', 'u', 'e', 'e', '2081']

Answer: 974NS


Question: 15, 19, ['b', '9265', '5121', '1651', 'L', 'H', '8667', '7263', '2321', '3799', 'R', 'P', 'u', '8287', '5341', '8889', '7143', '229', 's', '1779', '2929', '2739', '6123', 'k', 'J', 'k', '2893', '4735']

Answer:
s922341798881435