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: 4, 4, ['339', '1345', '9749', '6877', 'b', 'K', 'f', '1443']
Example Output: 7786

Example Input: 3, 12, ['N', '9659', '2169', '575', '2155', 'c', '2415', '3095', '2891', '8033', '3641', 'T', 'M', '8365', 'T', '343']
Example Output: T14633308198259035142c55125759612

Example Input: 4, 7, ['6849', '3047', '6393', '55', '715', 'v', 'y', 'X', 'v', '6327']
Example Output:
yv51755