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, 13, ['v', '9787', '3803', 'P', 'M', '7127', '7845', '6369', 'u', '8715', 'I', '7491', '6593', '459', '1747', 'L']
[EX A]: 39561947I5178

[EX Q]: 3, 5, ['2849', 'J', 'L', '2347', '7219', 'a', 'Q', 'U', '6865', 'O']
[EX A]: 91277432L

[EX Q]: 2, 8, ['q', '4997', 'E', '8975', 'a', 'f', '3101', '9325']
[EX A]:
52391013fa5798E7994