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, ['9261', 'o', '3981', '7407', 'z', 'T', '8643', '1181', '4253', 'G', 'u', 'M', '777', '4541', '1229', 'g', '3227', '8479', '6723', 'l']

MuG425311818643Tz74073981