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]: 30, 30, ['t', 'W', 'P', '7193', '913', 'j', 'Y', '9535', '7771', 'R', '9275', '7115', '3433', '5279', 'T', '8899', '9497', 'U', '3461', '1753', 'k', 'T', '7899', '6963', '9271', '9173', '3357', '3521', '7397', 'r']
[EX A]: r

[EX Q]: 4, 26, ['4559', '5923', '1221', 'M', 'v', '7313', 'A', '5961', '2619', '6981', '8351', '3013', 'v', '6483', '5211', '5047', 's', '8217', '6341', '5451', '4957', '8427', '7899', 'g', '4503', 'D', '9989', '9007', 'y', '5075']
[EX A]:
D3054g998772487594154514367128s740511253846v31031538189691621695A3137vM