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: 12, 17, ['5079', '8325', 'P', 'n', 'R', '8535', '1595', '9811', 'Z', '6475', 'Y', '8137', '9585', '7639', '7679', '7997', 'o', 'a', 'j', '2763', 'r', '1985', '4111', '2061']

o79977679763995858137