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, 10, ['X', '3687', 'p', '973', '7395', 'T', '9981', 'J', '261', 'V', '8571', 'I', '7911', 'F', 'K', 'J', 'T', 'F', '2249', '2975', 'D', '6279', '1529', '2957', 'y', '5285', 'X', 'v', '8115']
answer:
V162J1899T5937379p7863X


question:
1, 3, ['9937', 'F', 'g', 'B', 'M', 'x', 'n', 'V', '4241', 'Z']
answer:
gF7399


question:
2, 23, ['o', '9671', '261', 'r', '9709', 'M', 'H', 'w', 'o', '5019', '4355', 'N', '4473', 'A', 'D', '7697', 'a', 'b', 'J', 'n', 'T', 'u', '6561', 'a', '9749', 'V']
answer:

1656uTnJba7967DA3744N55349105owHM9079r1621769