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: 1, 1, ['341', '939']

Answer: 143


Question: 6, 19, ['5701', '5045', '6443', 'N', 'm', '3577', 'B', 'X', 'F', '7309', '3013', 'q', '8183', 'S', '3781', 'g', 'r', 'Z', '8147', 'M', '5275', '851', '7985', '5247', 'J', '5427']

Answer: 7418Zrg1873S3818q31039037FXB7753


Question: 3, 18, ['5025', 'n', 'B', 'f', '7443', 'k', '6249', 'B', '5009', '6509', 'W', 'y', '1571', '1131', 'v', '4133', 'z', '229']

Answer:
922z3314v13111751yW90569005B9426k3447fB