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]: 3, 7, ['P', 'P', 'H', 'r', '3563', 'n', 'M', '1577', '6453']
[EX A]: Mn3653rH

[EX Q]: 13, 18, ['1931', '2101', 'U', '3395', '7549', '5187', '4669', '9151', '6971', '5793', '2173', '2279', 'h', 'w', 't', '4769', '6581', 'D']
[EX A]: D18569674twh

[EX Q]: 1, 4, ['2717', 'U', 'E', 'h', 'a', 'R', 'G', '9321', '7981', 'v', '3759', '6841', '9253', 'j', 's', '3905', '4065', '8407', 't', 'E', '3573', 's', 'k', '8509', 'R', 'd']
[EX A]:
hEU7172