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:
2, 6, ['1467', 'm', '9771', '6533', 'm', 'x', 'c', 'd', '3139']
answer:
xm33561779m


question:
5, 9, ['g', 'B', '7695', 'X', 'h', 'A', '693', 'x', 'Q', 'l', 'Q', '9223', 'y', 'a', 'q']
answer:
Qx396Ah


question:
8, 16, ['d', '1483', '7645', 'B', 'F', 'W', 'a', 'g', 'g', '8931', 'I', '7899', '2011', '7817', 'h', 'g', 'D', 's', 'Z', 'v', '3133', 'l', '9725']
answer:

gh718711029987I1398gg