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: 5, 17, ['e', 'x', 'K', '3879', 'l', 'm', 'T', 'P', '4515', '2411', '7951', 'j', 'C', 'd', '3505', '5565', 'N', 'o', '6299', 'U', 'b']

N55653505dCj795124114515PTml