Definition: 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.
Input: 5, 18, ['w', 'F', 'J', 'n', '9581', 'T', 'I', '711', 'e', '1679', '4857', '1157', 'c', 'Q', '7593', 'g', 'K', 'Q', 'H', '2585', '2473', '655']

QKg7593Qc115748571679e711IT9581