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, 16, ['O', 'x', 'E', 'z', 'q', '2235', 'j', 'Q', '9655', '6887', '7651', '4695', 'p', 'M', '7975', 'p', 'u', '7275', 'y', 'w', '9677', 'I', '8609', '3333', '1835', '7137', '2509', '6157', '1805']
answer:
p5797Mp5964156778865569Qj5322qz


question:
1, 2, ['y', 'n', 'a', '4367', 'Q', 'S']
answer:
ny


question:
2, 6, ['B', 'r', '9191', '2171', 'p', '4369', '9587', 'B', '1701', '7673', '6539', 'd', '6771', '8003', '4069', '923', 'a', 'h', 'X', '625', '5965', 'T', '2377', 't', '2231']
answer:

9634p17121919r