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]: 14, 21, ['127', 'y', 'x', 'i', 'Z', 'l', '1427', 'O', '2291', 'P', '429', '4115', 'C', 's', '4065', 'M', '6453', 'C', '9475', 'Q', '6545', 'j', 'W', '7117', 'h', '7965', 'U', '5121', '3381', '4175']
[EX A]: 5456Q5749C3546M5604s

[EX Q]: 6, 27, ['p', '5559', 'b', '1087', '2763', 'j', 'U', 'N', '7099', '3001', 'x', 'Y', '1631', '2729', '7503', 'I', '8149', 'm', 'M', 'n', 'H', 'F', 'E', '9513', '8697', 'H', 'e', '5691']
[EX A]: eH79683159EFHnMm9418I305792721361Yx10039907NUj

[EX Q]: 5, 23, ['323', '7959', '2147', 'h', 'E', 'V', '1813', 'h', '3145', '4603', '5907', 's', 'r', 'N', '439', 'L', 'R', 'X', '331', '5155', 'R', 'I', '8633', 'd', '127', 'p', 'g', '7529']
[EX A]:
3368IR5515133XRL934Nrs709530645413h3181VE