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, 7, ['P', 'P', 'H', 'r', '3563', 'n', 'M', '1577', '6453']

Answer: Mn3653rH


Question: 2, 12, ['W', 'R', 'P', '9411', '179', '5175', '7959', 'o', '4285', 'H', '7535', '3423', 'Q', '7813', '611']

Answer: 32435357H5824o959757159711149PR


Question: 11, 18, ['t', '951', '5077', 'C', '2363', '6621', 'p', 'c', 'I', '7523', 'g', 'e', '8545', 'd', 'M', 't', 'C', 'm']

Answer:
mCtMd5458eg