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, ['X', '3523', 'J', '7489', '8961', '1939', '1871', '9383', '9335', 'b', 'I', 'A', 'p', '8021', '451', 'N', 'q', 'p', '5345', '669', 'T']

5345pqN4518021pAIb933593831871193989617489J