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:
4, 12, ['I', 'G', 'u', 'S', '9615', 't', 'p', 'P', 'R', 'v', '8819', '5379', 'I', '1165', '4545', '3117', '1577', 'y', 'W', 'R', 'O']
answer:
97359188vRPpt5169S


question:
10, 13, ['3493', '8321', '8153', 'Y', 'A', 'H', 'z', 'D', 'G', '3563', 'O', '697', '7357', 'F', 'V', '515', 'a', 't']
answer:
7537796O3653


question:
18, 25, ['2081', 'Q', '1117', 'c', '5105', '2569', '3925', '8051', 'D', '7843', 'X', '4381', '7147', '2441', 'o', '1863', '629', '6167', '6923', '5019', 'O', '1849', '5777', 'd', '5729', '2773', '3133', 'R', '1419']
answer:

9275d77759481O910532967616