instruction:
In this task, you are given inputs i, j, and A, where i and j are integers and A is a list. You need to find all elements of A from the ith element to the jth element, reverse the order in which they occur, and then concatenate them to output the resultant 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 concatenate the elements and then reverse the string.
question:
6, 10, ['W', '4485', 'x', '4885', '779', '5681', '5085', '3523', '2869', '3817', 'D', 'J', '5781', '4703', '8409', '7397', '1743', 'n', 'O', 'O', 'I', '2341', 'd']
answer:
38172869352350855681


question:
3, 4, ['Z', 'P', '7969', '7221', 'a', '5397']
answer:
72217969


question:
7, 10, ['u', '1457', 'Y', '5193', 'a', 'q', 'v', '5133', 'x', 'D', '1093', '5041', 'w', 'S', '9301', '9795']
answer:

Dx5133v