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.

Ex Input:
2, 6, ['Q', '4571', 'S', 's', '5669', '7689', '3335', 'C', 'J', '6565', '3031', 'G', '9817', 'O', '9691', '9069', 'u', '5965', 'R']

Ex Output:
98679665sS1754


Ex Input:
1, 2, ['S', '7763']

Ex Output:
3677S


Ex Input:
1, 11, ['1271', 'i', 'u', 'Z', '481', '7791', '5069', '405', '7555', 'b', '5845', 'd', 'l', '4575', '253', '8449', '7207', 't', 'M', '3493', '4267', '4899']

Ex Output:

5485b555750496051977184Zui1721