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.

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']
eH79683159EFHnMm9418I305792721361Yx10039907NUj

1, 5, ['3155', '5437', '1383', 'L', 'a']
aL383173455513

7, 18, ['U', 'V', '9429', 'U', 'Z', '1439', '6363', '2175', '8759', '3727', '5931', 'l', '7795', 'F', 'H', 'B', '3571', 'f']

f1753BHF5977l13957273957857123636