instruction:
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.
question:
5, 8, ['1861', '2831', '6423', '9641', 'o', 'J', '8215', '4149', '5345', '4371', '7747']
answer:
94145128Jo


question:
8, 8, ['911', 'n', '261', 'J', '1181', '6903', '2085', '5225', 'N', '4041', '4891', '6241']
answer:
5225


question:
21, 24, ['w', 'N', '7337', 'C', 'E', 'f', '153', 'D', 'N', 'w', '9727', 'n', '4233', 'h', 't', '99', 'u', '1985', 'B', 'q', '3877', 'u', '8607', 'u']
answer:

u7068u7783