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.

[EX Q]: 9, 11, ['m', 'r', '5241', 'x', 'Q', 'f', '1167', '1869', '4753', 'g', 'y', 'M', '7109', '2177', 'h', 'K', '5481', '9731', 'u', 'K', 'E', 't', '4867', '4539', '7943', 'W']
[EX A]: yg3574

[EX Q]: 1, 5, ['d', 'p', 'B', 'i', '5865', '4569']
[EX A]: 5685iBpd

[EX Q]: 6, 6, ['1463', '8141', '7033', 'Q', '2457', '5043', '4643', 'd', '9439', 'Y', 'W', 'I', 'a', 'K', '2097', '3275', 'h', 'r', '3387', 'N', '3467', 'e', '8979', '9033', 'Z', 'C', '6677']
[EX A]:
3405