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]: 2, 2, ['G', 'S']
[EX A]: S

[EX Q]: 5, 25, ['8867', 'K', '315', 's', '8813', 'N', 'E', 'M', '1411', '6741', '2403', '7973', 'P', '2199', '9551', 'S', 'W', '4163', '7209', 'E', '2113', 'J', '8953', '1319', 'b', '7627', 'j', 'r', '6323', '1101']
[EX A]: b91313598J3112E90273614WS15599912P3797304214761141MEN3188

[EX Q]: 7, 23, ['P', '7555', 'B', '3977', 'r', 'H', '9613', 'T', 'a', '3499', '7679', 'l', 'O', '4741', '5201', '7837', '157', '1569', '9675', '4103', 'M', '3201', 'K', '123', '9', '7791', '7383', 'x', 'T', '7985']
[EX A]:
K1023M301457699651751738710251474Ol97679943aT3169