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, 9, ['w', 'L', '7649', 's', 'D', '45', 'L', 'O', 'H', '2781', '6883', 'h']

SOLUTION: HOL

PROBLEM: 4, 17, ['897', 'R', 'L', '201', 'Z', 'o', 'A', '9367', 'E', 'G', '6653', 'i', 'V', 'F', '9433', 'G', '8073', '5739', '7009']

SOLUTION: 3708G3349FVi3566GE7639AoZ102

PROBLEM: 4, 16, ['F', 'k', '3279', 'g', '2491', '9027', 'r', 'P', '279', 'D', '151', '8737', 'z', '97', '9909', 'e', 'Q', 'B']

SOLUTION:
e909979z7378151D972Pr72091942g

