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, 19, ['R', 'y', 'g', 'A', '8013', '3993', 'j', 'w', '5135', 'y', 'n', '7567', '5101', 'h', 'r', 'E', 'u', '7593', '7409', '503', '8129']

74097593uErh51017567ny5135wj39938013A