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: 1, 1, ['341', '939']
Example Output: 143

Example Input: 10, 10, ['Z', 'Z', '2205', '7113', 'G', 'k', '973', 'I', 'n', '415', '1505']
Example Output: 514

Example Input: 2, 3, ['7445', '6677', 'H', '8349', '7475', '3409', '8535', '1177', 'K', '1887', '4519', 'c', '7415', '899', 'f']
Example Output:
H7766