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: 3, 12, ['L', '4421', 'J', 'Y', 'I', '3955', 'p', '713', '9915', '4185', '119', 'e', 'R', 'H', '4667', 'C', '5001', 'y', 'p', '4577', '5329', 'E', 'U']

e11941859915713p3955IYJ