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.

1, 12, ['f', '8665', '6205', 'L', 'y', 'P', '9351', 'k', '1387', '657', 's', 'k']
ks7567831k1539PyL50265668f

1, 3, ['6017', 'o', '1817', 'W']
7181o7106

16, 17, ['I', '3353', 'B', 'Y', 'J', 'X', '4041', 'a', '4423', 'Y', '1489', 'h', 'a', 'Y', 'c', '7987', '3851', '1569', 'k', '285', 'i', 'i', 'C', '5277']

15837897