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, 3, ['2047', 'R', '6885', '1243', 'Z']

Answer: 5886


Question: 10, 10, ['7719', 'K', '7323', '7843', '7079', 'y', '6777', 'M', 'S', 'v', 's', '4857', 'J', '8269', 'm']

Answer: v


Question: 4, 5, ['8335', '6161', 's', 't', 'O', '4477', '621', '2065', '53', 'K', 'M', '2133', 'o', 'X', '2187', '5495']

Answer:
Ot