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, 15, ['6909', '4265', '7129', '4661', '3899', 'P', '1639', '1595', '659', '3253', '2971', 'E', 'T', 'A', 'I', '4537', '1427', 'K', 'Z', '8003', '8827']

IATE2971325365915951639P38994661