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, 7, ['5115', '3679', '9619', '8895', 'S', 'T', '5735', 'H', 'a']
[A]: 5375TS59889169


[Q]: 8, 21, ['2381', '5057', 'o', 'M', '7495', '3787', '3877', '5055', '6055', '4145', 'v', 'O', 'K', '361', 'X', 'H', '357', 'H', '7553', 'S', 'R', 'H', '5973']
[A]: RS3557H753HX163KOv541455065505


[Q]: 7, 10, ['3335', '8229', 'c', '4431', 's', 'Y', '901', 'k', 'm', '4207']
[A]:
7024mk109