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.

Ex Input:
4, 12, ['4811', '5765', '695', '8003', '9709', 'Q', '3265', '1983', '8313', 'P', '7717', 'V', '5061', 't', '7263', 'z', 'a', '3807', '9269', '2399', '8537', 'O', 'd', 'j']

Ex Output:
V7717P831319833265Q97098003


Ex Input:
8, 21, ['7449', 'R', '469', 'm', 'A', '817', '9583', '239', 'n', '3597', 'C', '6853', '2745', '3827', '5775', 'x', '3875', '7503', '8903', '9679', '819']

Ex Output:
8199679890375033875x5775382727456853C3597n239


Ex Input:
1, 19, ['N', 'l', 'E', 'k', 'l', 't', 'X', '9725', 'S', '979', 'j', 'U', 'W', 't', 'R', '8821', 'J', '1655', '6561', 'x', '5311']

Ex Output:

65611655J8821RtWUj979S9725XtlkElN