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: 3, 18, ['R', '7241', 'A', 'z', '8115', '6251', 'F', '1405', 'N', '3567', '1525', 'a', '6057', 'E', '5637', '4969', '3499', '5489', 'Z', 'K', 'M', 'I', 'Z', 'j']

Answer: 9845994396947365E7506a52517653N5041F15265118zA


Question: 6, 8, ['4263', '4799', 'D', '4627', 'P', 'z', '8589', '5107', 'T', 'R', 'L', 'G', 'd']

Answer: 70159858z


Question: 6, 12, ['7617', 'v', '8815', 'u', '1539', 'k', 'P', 'c', 'L', '7635', '9953', 'y', 'U', 'q', '9219', 'g', 'd', '7457', 'B', 'U', '1661', 'U', 'o', 'R']

Answer:
y35995367LcPk