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, 12, ['9227', 'P', 'T', 'k', 'p', '9785', '2047', 'M', '827', '2815', 'C', '7071', 'Y', 'y', '3657', '9961', 'o']
[EX A]: 1707C5182728M74025879p

[EX Q]: 15, 25, ['n', '4163', '6355', '4085', 'u', 'X', '7669', 'c', '791', '7517', '3153', 'k', 'S', '1263', 'P', '1613', 'q', '7693', '339', '7041', '3591', '9429', '4695', '2959', 'm', 'g', '2827', '6699', '1243', 'Y']
[EX A]: m959259649249195314079333967q3161P

[EX Q]: 19, 20, ['p', 's', 'e', '8957', 'M', 'Q', 'h', '1289', '4753', 'w', '5791', '3601', 'y', '3445', '4645', 'S', '2281', 't', '2547', 'm', '5293', 'D', 'A', '1029']
[EX A]:
m7452