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]: 10, 10, ['Z', 'Z', '2205', '7113', 'G', 'k', '973', 'I', 'n', '415', '1505']
[EX A]: 514

[EX Q]: 3, 4, ['E', 'k', '4697', 'f', 'J', 's', '1265', '4673', 'D', '3345', 'n', '5593', '2249', '5951']
[EX A]: f7964

[EX Q]: 12, 14, ['6727', '1609', 'w', 'J', 'N', '9605', '5233', '3977', '7999', 'b', '2929', 'O', '7075', 'e', '7645', '2443', 'x', 'K', '7941', 'Q', '7761', '8465', '5235', 'b', '4739', 'd']
[EX A]:
e5707O