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: 2, 5, ['1987', '3507', '839', '3509', '9857', 'V', '9987', 'g', 'G', '7295', 'v', 'b', 'o', 'Q', 'Q', 'x', '3295', '9917', 'R', '221']

Answer: 758990539387053


Question: 5, 5, ['8095', 'D', '9477', '9307', '9355', 'U', 'y', '5197', '2691', '3061']

Answer: 5539


Question: 23, 29, ['x', 'a', 'Y', 'K', 'c', 'n', 'l', '9431', '9321', '9595', '4133', 'e', '9717', 'z', '3361', 'C', 'O', 'i', '3801', 'z', '9611', '1151', '1709', '3997', 'j', 'm', 'r', 'n', '4777']

Answer:
7774nrmj79939071