In this task, you are given inputs i, j, and A, where i and j are integers and A is a list. You need to find all elements of A from the ith element to the jth element, reverse the order in which they occur, and then concatenate them to output the resultant 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 concatenate the elements and then reverse the string.

[EX Q]: 6, 15, ['7417', 'a', '479', 'E', '1575', '6937', '4649', '9879', '9875', 'c', '1671', 'K', '3773', '6999', 'J', '9889', 'q', '4099', 'r', '1859', 'W']
[EX A]: J69993773K1671c9875987946496937

[EX Q]: 6, 13, ['7805', '3575', 'k', '8497', 'C', 'p', 'x', 'v', 'g', '1919', '397', '2757', '6027', 'u', '507']
[EX A]: 602727573971919gvxp

[EX Q]: 7, 13, ['5431', '2827', 'c', '9469', 'C', 'O', 'y', '9643', '8545', '6163', '9169', '837', 'q', 'j', 'p', 'z', '3213']
[EX A]:
q8379169616385459643y