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: 3, 19, ['7517', 'y', '13', 'l', 'R', '7021', 't', '6607', '3305', '4767', '8831', '2779', '87', 'J', '5613', 'p', '8813', 'R', '6515', 'E']

6515R8813p5613J8727798831476733056607t7021Rl13