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: 6, 18, ['o', '819', 'o', '1063', 'c', 'v', 't', 'D', 'R', '3449', 'x', 'L', 'N', 'C', '739', '2995', 'B', '3609', 'j', '2777', 'R', '9183', '4641', '9585', '1875', 'p', '5919', '9415']

3609B2995739CNLx3449RDtv