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: 1, 2, ['3909', '5863', '707']

A: 36859093
****
Q: 10, 19, ['6733', 'q', '2197', 'h', '9975', '3059', 'e', '8475', '281', 'L', '9119', 'B', '8857', 'U', 'R', 'h', 'e', 'J', 'P', 'l']

A: PJehRU7588B9119L
****
Q: 6, 18, ['h', '1831', 'I', 'e', '969', '5431', 's', 'B', 'J', '6887', 'O', '1701', 'R', 'V', '1135', '9667', '2017', 'B', '5697', 'N', '7907', '7355', 'o', 'K', '3619', 'c', 'C']

A:
B710276695311VR1071O7886JBs1345
****