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]: 10, 14, ['q', 'M', 'D', 'x', 'L', 'B', '519', '2767', 'P', '3341', '7817', 'Q', 'd', '3819']
[A]: 9183dQ71871433


[Q]: 10, 17, ['1055', 'A', '8503', 'T', '1153', '9703', '9357', '7609', '8367', '1903', '5245', 'D', 'd', '9381', '819', '927', '4543', '4363', '6969', '5555', 'E', 'l', 'v', 'D', '1173']
[A]:
34547299181839dD54253091