In this task, you are given inputs 'i', 'j', and A, where 'i' and 'j' are integers and A is a list. A list is shown by two brackets and comma-separated numbers and characters inside, like ['1', '12', 'l']. You need to concatenate all elements of A from the ith element to the jth element, and then reverse the resulting 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 reverse first and then concatenate.

Q: 3, 7, ['P', 'P', 'H', 'r', '3563', 'n', 'M', '1577', '6453']

A: Mn3653rH
****
Q: 1, 1, ['341', '939']

A: 143
****
Q: 2, 20, ['f', 'K', '2641', '9135', '1123', 'C', '5101', '6759', 'n', 'T', 'I', 'k', '8073', 'R', 'Z', '2941', '9905', '743', 'a', '9481', 'p', 'y', '7949', '1191', '9561', '7659']

A:
1849a34750991492ZR3708kITn95761015C321153191462K
****