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, 27, ['9785', 'O', '1451', '263', 'V', '9045', 'n', 'K', 'B', '8131', '6137', '437', 'v', 'd', '2787', '3483', '3141', '2151', 'r', 'q', '2981', '4301', '1947', '7631', '8755', 'F', 'W', 'L', 'O']
[EX A]: WF55781367749110341892qr1512141338437872dv73473161318BKn

[EX Q]: 1, 10, ['X', '3687', 'p', '973', '7395', 'T', '9981', 'J', '261', 'V', '8571', 'I', '7911', 'F', 'K', 'J', 'T', 'F', '2249', '2975', 'D', '6279', '1529', '2957', 'y', '5285', 'X', 'v', '8115']
[EX A]: V162J1899T5937379p7863X

[EX Q]: 11, 15, ['9425', '7003', '8889', 'u', '1751', '5959', '3289', 'L', 'y', 'h', '1981', 'Q', '3453', '615', '6575', '715', 'l', '7789', '5585', '6505', '6445', '7415', 'B', '4247', '7063', '2717', 'W']
[EX A]:
57565163543Q1891