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]: 15, 18, ['9099', '2041', '7065', '1323', '2267', '5877', 'r', 'j', '4411', 'u', 'V', '4919', '6401', '8449', 'X', 'H', 'z', 's', '2543', '4643']
[EX A]: szHX

[EX Q]: 15, 16, ['243', '3195', '1763', '1283', '1463', '2655', '7', 'S', 's', '3155', 's', 'D', '7659', 'Q', 'm', '3821', '593', 'D', '5447']
[EX A]: 3821m

[EX Q]: 1, 2, ['T', 'H', '5113', '371', 'z', 'i']
[EX A]:
HT