TASK DEFINITION: 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.
PROBLEM: 7, 17, ['j', '4189', 'N', 'y', 'K', '411', '7999', '8761', '3647', '2651', '805', 'e', 'K', 't', '2753', 'G', '9047']

SOLUTION: 7409G3572tKe5081562746316789997

PROBLEM: 6, 12, ['z', 'E', '6097', 'G', 'Z', 'X', '4155', 'r', 'n', 'i', '4915', 't', 'P', 'A']

SOLUTION: t5194inr5514X

PROBLEM: 3, 17, ['6425', '7643', 'e', 'n', '2507', 'T', 'h', 'n', '671', '9599', '6061', 'E', 'L', '6385', 'S', 'x', '3943', '3539', 'b', 'x', 'n']

SOLUTION:
3493xS5836LE16069959176nhT7052ne