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, 8, ['4367', '4367', 'm', '5681', '931', '9039', '8313', '6335', 'w', 'd', 'V', '1741', '1703', 'I', 't', 'a', 'P', 'P', 'x']
[EX A]: 53363138

[EX Q]: 1, 1, ['341', '939']
[EX A]: 143

[EX Q]: 5, 18, ['9773', 'b', 'n', 'Y', 'b', 'N', '2691', '1999', 'r', '4915', 'D', '4115', 'r', '611', 'c', '1169', '8777', 'i', 'Y']
[EX A]:
i77789611c116r5114D5194r99911962Nb

