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.

[EX Q]: 2, 4, ['O', '7177', 'f', 'Q', '3429', '3121', '4399', 'H', '6081', 'V', '4367', '7889', '5533', '9109', 'K']
[EX A]: Qf7177

[EX Q]: 1, 4, ['s', 'n', '6721', 'W', 'H']
[EX A]: W6721ns

[EX Q]: 3, 4, ['P', 'I', '1791', 'B', '7753', '5639', '4649', 'c', '295', 'u', 'N']
[EX A]:
B1791