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:
5, 21, ['J', '6557', '5301', '3201', '9347', '9131', '343', '683', 'A', 'c', '335', '6901', '4769', '6013', '4753', 'e', 'B', 'Q', '815', '9515', 'b', 'L', '8979', '8995', 'h', '479', '4793', '8573', '7739']

Ex Output:
b9515815QBe4753601347696901335cA68334391319347


Ex Input:
3, 9, ['I', 'L', 'k', '543', 'R', 'D', 'B', '9659', '7595', 'O', '8599', 'p', 'x', '7577', '2979', '8467', 'w', 'Q', '8385', '133', '675', '7447', 'l', 'J', '7157']

Ex Output:
75959659BDR543k


Ex Input:
8, 11, ['t', '4397', 'R', 'Z', 'o', '7889', 'O', '6189', 'W', 'j', 'L', 'O']

Ex Output:

LjW6189