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]: 26, 26, ['6889', '1843', '3667', 'I', '7035', '5757', 'L', '4247', '1471', 'z', '8037', 'Z', '6985', '3539', '2133', 'g', 'z', '885', 'R', 'c', '9571', '2733', 'a', 'C', '8691', '9527']
[EX A]: 7259

[EX Q]: 1, 4, ['I', '5919', 'J', '6387']
[EX A]: 7836J9195I

[EX Q]: 1, 5, ['6285', 'a', '3157', 'x', '1173', 'f']
[EX A]:
3711x7513a5826