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]: 5, 12, ['6701', '3911', '1591', '3829', '3381', 'J', '8635', 'r', '8867', 'N', '2397', '1677', 'c', '9799']
[EX A]: 77617932N7688r5368J1833

[EX Q]: 1, 18, ['h', 'c', 'J', 'C', '2371', '7267', 'T', 'W', '1277', 's', 'g', '4555', 'n', 'g', '1535', '4369', '9577', 'R', 'p', '7441', 'r', '3533', 'h', '1045', '2211', 'g', '6349', 'i', '9305', '5295']
[EX A]: R775996345351gn5554gs7721WT76271732CJch

[EX Q]: 16, 18, ['301', 'p', 'r', 'X', 'a', 'd', 'e', 'q', '7093', '1889', '5199', 'U', '7439', 'o', 'V', 's', '4511', 'W', 'X', 'w', 'J', '8803', 'd']
[EX A]:
W1154s