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: 18, 19, ['m', '2435', 'l', 'P', '7113', 'S', '4647', '2493', 'C', 'Q', 'a', 'g', '4365', 'G', 'B', '1105', '9259', '5637', 'G', 't']

G5637