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, 15, ['U', 'z', '9255', 'F', 'G', '7403', '6287', 'm', 'P', '4715', '1613', 'G', '1911', 'S', '8823', '9415', 'z', '6359', '1225', 'T', 'z', '1557', 'r', 'M', 'i', '5047', 'b', 'W']
answer:
3288S1191G31615174Pm78263047G


question:
7, 17, ['j', '4189', 'N', 'y', 'K', '411', '7999', '8761', '3647', '2651', '805', 'e', 'K', 't', '2753', 'G', '9047']
answer:
7409G3572tKe5081562746316789997


question:
2, 4, ['2727', '6227', '9473', '5023', 'i', '2541', '683', '1093', '4997', '3401', 'u', 'U', '939', '1467', '3977', '855']
answer:

320537497226