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]: 6, 7, ['8123', 'G', '4941', 'Z', 'i', 'T', '3335']
[EX A]: 5333T

[EX Q]: 1, 4, ['619', '9623', '5589', 'r', 'Z', '3065', 'p', '9567', '5065', '8433', '2807', 'b', '8271', 'k']
[EX A]: r98553269916

[EX Q]: 11, 23, ['3753', 'O', 'J', 'd', 'R', '5385', 'Z', 'k', '7607', '9841', '9365', '8351', 'B', '8699', '3637', '9437', '9657', 'r', '4513', '8641', '1289', 'b', '1887', 'W']
[EX A]:
7881b982114683154r7569734973639968B15385639