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]: 1, 3, ['4181', '3741', 'Q']
[EX A]: Q14731814

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

[EX Q]: 1, 7, ['K', 'F', '5251', '4713', '619', '7041', '9101', '901', '6099', '2571', 'f', 's', 'm', 'X', '7891']
[EX A]:
1019140791631741525FK