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: 19, 20, ['J', '775', '6953', '5905', 'E', 'J', '6409', 'P', '2867', 'Z', 'T', 'L', 'A', '7781', '6179', 'Q', '945', '8289', '8957', '4325', '6453', '7491', '7455', 'M', 'f', '9279', '4039', '625', '9461']

43258957