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, 6, ['643', 'X', 'F', '7453', '8495', '7943']

Answer: 349759483547F


Question: 2, 7, ['e', 's', '7009', 'z', 'I', '8649', '6405', '551', 'C', '5325', 'V', 'i', 'w', 'K', 'w', 'R']

Answer: 50469468Iz9007s


Question: 2, 14, ['5521', 'y', 'r', '4857', '4549', '1857', '5159', 'e', 'u', '387', '1111', 'n', '3355', '9961', '2887', '7023', '1781', 'y', 'm']

Answer:
16995533n1111783ue9515758194547584ry