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:
1, 2, ['Q', '6249', 'm', 'H', 'x', 'b', 'Z', 'z', '15']
answer:
9426Q


question:
8, 8, ['n', '9001', 't', 'e', 'W', '2287', 'f', '2735', 'z', '3065', 'J', '5609', 'e', 's', 'F']
answer:
5372


question:
5, 23, ['357', '8563', '8693', '7927', 'z', '2607', '2379', '2161', '3079', '4757', 'C', '5647', '6783', '7033', 'a', '7249', '143', '4329', 'E', 'K', '4731', 'p', '4313']
answer:

3134p1374KE92343419427a330738767465C75749703161297327062z