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: 4, 12, ['s', '4401', 'k', '9937', '2579', '4105', 'Y', '655', '1783', '2265', 'Z', 'Q', 'y', 'D']

QZ22651783655Y410525799937