Detailed Instructions: 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: 12, 13, ['4449', '9473', '3449', '863', '2769', '1031', '6607', '923', 'r', '6499', '6879', 'z', '4503', '5907', 'V', 'G', '4755', '619', 'Z']
A:
3054z