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]: 1, 3, ['9937', 'F', 'g', 'B', 'M', 'x', 'n', 'V', '4241', 'Z']
[EX A]: gF7399

[EX Q]: 19, 28, ['2809', '2943', '209', 'I', '4961', 'z', '6499', 'j', '8323', 'v', '6955', 'E', '2591', '5523', 'D', 'j', '3929', 'L', '501', 'Y', 'e', 'p', 'F', '1073', 'o', '3531', '9245', 'K']
[EX A]: K54291353o3701FpeY105

[EX Q]: 1, 14, ['2437', '4269', 'C', 'N', 'A', 'r', 'E', '7497', 't', '1439', '3709', '4365', 'D', '6375', 'v', 'k', '2929', '1903', 'y', 'O']
[EX A]:
5736D563490739341t7947ErANC96247342