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.

[Q]: 3, 20, ['x', 'S', 's', 'a', '5077', 'D', '3979', 'I', '3129', 'R', '8517', 'r', 'l', 'K', 'N', '9701', '227', 'n', '9385', 'U']
[A]: U5839n7221079NKlr7158R9213I9793D7705as


[Q]: 5, 12, ['9227', 'P', 'T', 'k', 'p', '9785', '2047', 'M', '827', '2815', 'C', '7071', 'Y', 'y', '3657', '9961', 'o']
[A]: 1707C5182728M74025879p


[Q]: 1, 5, ['T', '749', '1161', 'Q', '3719', '5525', 'l']
[A]:
9173Q1611947T