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:
13, 15, ['L', 'A', '2959', 'g', '7157', '9131', 'o', 'D', 'q', 'd', 'A', '4249', 'K', 'U', '4805', 'h', '7981']
answer:
5084UK


question:
16, 26, ['d', 'o', '8115', '7489', 'n', '9243', '5821', '5381', '5059', 'V', 'T', '6557', '2885', '721', '3867', '5941', '7613', '2933', '253', 'l', '7339', '3743', 'U', '7921', 'Q', '2077']
answer:
7702Q1297U34739337l352339231671495


question:
3, 15, ['1889', 'i', 'C', 'x', '8161', '4471', '1485', 'X', 'u', 'L', '251', 'W', '5879', 'K', '1683', 'o', 'B', '4109', '2075', '4389', 'i', 'b', '295']
answer:

3861K9785W152LuX584117441618xC