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

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

Example Input: 4, 8, ['s', '4361', 'w', 'X', 'U', '7685', 'D', 'L', 'q', 'u', 'z', 'P', '2269', 'v', '7453', 'e', '4547', 'w', 'W', 'A', '6281', 'n', '6927', '7513', '469', 'q', 'B']
Example Output:
LD5867UX