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.

Example Input: 1, 7, ['P', 'h', '1443', 'b', 'K', '2641', '3831']
Example Output: 13831462Kb3441hP

Example Input: 2, 2, ['4359', 'G', 'A']
Example Output: G

Example Input: 5, 9, ['27', 'i', 'l', 'q', 'u', 'f', 'I', '6479', '8605', '1149', '947', '2523', '4973', 'N', 'C', 'y', 'q', '9071', '2031', '327']
Example Output:
50689746Ifu