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: 4, 7, ['C', 'j', 'F', '495', 'H', '6595', 'h', '7567', 'f']

Answer: h5956H594


Question: 17, 21, ['5503', '2979', '6307', '633', 'n', '9339', '5829', '5291', '8967', 'i', '9063', '975', 'G', '9187', '3227', 'A', '3487', '8187', 'H', '6097', 'H']

Answer: H7906H78187843


Question: 10, 11, ['k', '6217', '3971', '1429', 'z', 'P', 'm', '5173', '9283', '4023', '7631', '8333', '1655', '6319', '6645', '5911', 'L', '2087', '4263', '1743', '7221', '4685', 'G', '2373', 'T', '2521']

Answer:
13673204