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 Q]: 7, 9, ['5683', 'M', '3363', 'H', '161', '6767', 'w', 'j', 't']
[EX A]: tjw

[EX Q]: 9, 10, ['l', '9027', 'D', 'T', '6001', '7127', '2551', '3093', 'i', '3453']
[EX A]: 3543i

[EX Q]: 2, 6, ['309', '8253', 'D', '7171', 'd', '4099', '6689', 'S', '5667']
[EX A]:
9904d1717D3528