In this task, you are given inputs i, j, and A, where i and j are integers and A is a list. You need to find all elements of A from the ith element to the jth element, reverse the order in which they occur, and then concatenate them to output the resultant 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 concatenate the elements and then reverse the string.

[Q]: 7, 7, ['5203', 'C', '929', 'r', '6435', 'p', '303']
[A]: 303


[Q]: 1, 3, ['Y', 'k', 'P', '1517', 'z', '8727', 'U']
[A]: PkY


[Q]: 2, 3, ['2973', 't', 'W', '8731']
[A]:
Wt