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 Input:
1, 7, ['3145', '4447', 'h', '1723', '2791', '8085', 'H', 'R', '5457', 'F', 'P', 'N', 'u', 's']

Ex Output:
H808527911723h44473145


Ex Input:
1, 13, ['a', '5893', '8377', '7099', 'a', 'x', '8957', '7523', 'g', 'Z', '9781', '8507', '9351', '1577', 'H', 'd', 'U', 'f', 'T', 'T']

Ex Output:
935185079781Zg75238957xa709983775893a


Ex Input:
19, 21, ['S', '8831', '3133', 'h', '8637', 'T', 'l', 'Z', 'v', 'g', '8583', '3859', '6779', '1477', 'j', 'e', '9419', 's', 'a', 'P', '1399', '6221', 'C', '4479', 'F']

Ex Output:

1399Pa