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]: 5, 13, ['217', '841', 'G', 'N', '5667', '9343', '8067', '7679', 'T', 'Z', 'G', '6499', 'n']
[EX A]: n9946GZT9767760834397665

[EX Q]: 2, 4, ['o', '5393', 'p', 'h', '5617', 'F', 'I', 'a']
[EX A]: hp3935

[EX Q]: 12, 17, ['w', '9563', '2543', '4559', 'M', '3279', 'B', 'r', 'x', 'U', 'T', '7843', 'S', '5451', 'j', '7591', 'z', 'H', '3651', '7441', 'j', 'L', '1105', 'K', '5021']
[EX A]:
z1957j1545S3487