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: 2, 12, ['9797', 'D', '41', 'Y', 's', 'u', 'X', 'Q', '2437', '7385', '7137', 'S', '6367', 'w', 'f', '7021', '7685', '7413']

SOLUTION: S731758377342QXusY14D

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: 8, 12, ['7365', 'p', 'q', '4287', 'L', '4231', 'D', 'k', 'u', '9391', '825', '2859', '3543', '7337', 'u', 'N', '9395', '4349', 'Y', 'L', '1327', '5369', 'u', '2329', 'H']

SOLUTION:
95825281939uk