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]: 10, 18, ['S', 'S', '6525', '3017', '9729', '5747', '4409', '9501', '4083', 'f', 'X', 'B', 'u', '5967', '9949', '7227', '6993', '8105', 'n', 'C', '2131', '3105', 'd', 'E']
[EX A]: 50183996722794997695uBXf

[EX Q]: 1, 2, ['3303', '6127']
[EX A]: 72163033

[EX Q]: 1, 6, ['7347', 'u', '7957', 'l', '2969', 'e', 'q', '8549', '2257', '9727', 'n', '155', '4047', '7811', 'u', 'L', '2693', '17', 'o', '3057']
[EX A]:
e9692l7597u7437