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]: 3, 3, ['8097', '3167', '809']
[EX A]: 908

[EX Q]: 4, 9, ['9213', '2865', '1347', 'Y', 'A', '6261', 'E', 'w', 'r', 'B', 'j', '9157', 'r', '485', '8951']
[EX A]: rwE1626AY

[EX Q]: 17, 20, ['z', 'r', 'j', '153', '7245', 's', 'e', '2005', 'I', 'R', 'L', '1295', '7827', 'S', '6541', '829', '7907', '9203', 'a', '1981', '5961', 'u', '4395']
[EX A]:
1891a30297097