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, 12, ['k', 'R', '1725', '311', 'A', '1325', '4955', 'Y', 'U', 't', '9543', 'o', '7719', '1727', 'n', 'R', '9999', 'A', 'o', '1735', 'e', 'R']

o9543tUY49551325A