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: 2, 12, ['455', 'Y', 'V', '6499', 'j', 'J', 'n', '3775', 'W', 'S', '1999', 'k', 'W', '3907', 'H', 'S', 'H', 'j']

k1999SW3775nJj6499VY