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.

2, 12, ['9797', 'D', '41', 'Y', 's', 'u', 'X', 'Q', '2437', '7385', '7137', 'S', '6367', 'w', 'f', '7021', '7685', '7413']
S731758377342QXusY14D

2, 2, ['q', 'w', 'D', 'A', '3751', 'G', '2419', 'V']
w

15, 15, ['2599', '3885', 'p', 'f', '3305', '4137', '9779', 'j', '9899', '549', '3431', '6013', 'w', 'Y', 'F']

F