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, 4, ['4887', 'N', 'y', '2813', 'C', 'J', 'v', '3199']

Answer: 3182y


Question: 6, 11, ['B', 'j', '911', 'A', '7195', 'm', '7177', 'X', '2015', 't', 'P', 'x', 'F']

Answer: Pt5102X7717m


Question: 11, 17, ['m', 'j', 'w', '4247', '2205', '8605', '9011', 'b', 'X', '2089', '6857', 'L', 'P', 'L', '5191', 'u', 'z', '5989', '131', 'f', 'm', '239']

Answer:
zu1915LPL7586