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: 8, 21, ['9847', '3163', 'L', 'E', 's', 'I', 'H', 'e', 'l', '8875', '547', 'F', '4221', '5105', '5409', 'M', '6617', 'Z', 'g', '9257', 'l', 'q', 'p', 'Q', '6755', '265', '9845']

Answer: l7529gZ7166M904550151224F7455788le


Question: 1, 7, ['B', '707', '7101', 'l', 'i', 'Q', 'e', '9437', 'i', '4709', 'w', 't', '1459', 'A', 'E', '923']

Answer: eQil1017707B


Question: 17, 23, ['P', '5315', 'E', '919', '2199', '9685', '2675', '9769', '649', '37', 'k', 'd', 'v', '3843', 'a', 'L', 'I', 't', 'Q', 'Y', 'K', '4901', 'H', '3453', 'U', 'O', '8605']

Answer:
H1094KYQtI