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, ['7635', 'c', 'h', 'D', 'K', '7235', 'e']
[EX A]: hc5367

[EX Q]: 3, 9, ['Y', '9075', '2327', '1643', '655', '935', 'a', 'j', 'm']
[EX A]: mja53955634617232

[EX Q]: 2, 16, ['2147', 'O', 'z', '9587', 'c', '383', 'e', '1417', 'K', '1987', 'f', '4041', 'M', 's', 'Q', 'L', '7817', '5285', 'k', '6967', 'y', 'O', '2377', '337', '7707', '3075', 'A']
[EX A]:
LQsM1404f7891K7141e383c7859zO