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: 1, 15, ['6739', '2257', '6943', 'M', '8115', '7763', '5077', '6531', 'v', 'T', '1135', '5897', '4497', 'y', '5579', '7657', 'r', '3971']

5579y449758971135Tv6531507777638115M694322576739