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:
8, 9, ['s', 'X', '6737', 'M', 'm', 'N', 'a', 'Q', 't']
answer:
tQ


question:
4, 20, ['p', '1643', 'O', '5867', 'Y', 'j', '2411', 'Z', '2563', '4757', 'B', 'b', '7489', '815', 'c', '6631', '8571', '6537', 'm', 'T']
answer:
Tm735617581366c5189847bB75743652Z1142jY7685


question:
10, 12, ['9033', 'e', 'h', 'R', '6149', '2847', '8397', 'D', 'x', 'M', 'R', '1089', '3183', '9111', '1789', '7183', 'V', 'p', '6211']
answer:

9801RM