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]: 4, 7, ['1247', 's', 'J', 'w', 'X', '7211', 'c']
[EX A]: c1127Xw

[EX Q]: 10, 11, ['5441', 'k', '9573', '4937', '7305', '2303', 'P', 'P', 'N', '2549', 'C', '5865', 'M', '9033', 'k', 'A']
[EX A]: C9452

[EX Q]: 4, 7, ['6861', '8459', 'D', '3875', '7337', '8877', '6563', '6297', '1555', '8951', 'P', '2695', 'R', '3655', 'F', 'A', '3789', 'z', 'R', 'O', 'W', 'b']
[EX A]:
3656778873375783