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]: 7, 8, ['1601', 'M', '4289', 'n', 'r', '8973', 'F', 'Y', 'v', '3357']
[EX A]: YF

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

[EX Q]: 3, 22, ['9105', '9213', '6687', 'd', 'j', '1', '4759', 'U', 'G', 'N', 'B', '3125', 'D', '9377', 'Q', '9553', 'h', '2031', 'y', 'j', 'M', 'G', '4471', 'l', '6795', 'b', 'U']
[EX A]:
GMjy1302h3559Q7739D5213BNGU95741jd7866