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, 4, ['3633', 'k', '9685', 't']
[EX A]: t5869k3363

[EX Q]: 2, 6, ['6717', '6639', 'l', 'i', 'o', '1819']
[EX A]: 9181oil9366

[EX Q]: 10, 22, ['r', '7443', 'v', '1955', '8507', '9029', '6311', 'Q', 'C', '89', 'U', 'd', '8869', '8459', '6627', '4733', '7981', 'u', '7901', 'c', 'S', 'C', '1159', '4315', '7789', 'E']
[EX A]:
CSc1097u18973374726695489688dU98