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, 4, ['i', '2555', 'G', '4549', 'a', '7443', '5361']
9454G5552

2, 11, ['6519', 'l', '6577', 'z', '4271', 'R', 'O', '7809', 'K', 'V', '4531']
1354VK9087OR1724z7756l

10, 12, ['Y', '3067', 'R', 'r', 'y', 'a', '4153', 'e', '1727', 'm', 'y', 'X']

Xym