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, 3, ['G', 'G', '7823', '8645', 'k', '1369', '7495', 'V', '2195', 'x', '3061', 'k', '7539', 'H', '8197', 'S', '7969', '9259', 'j']

SOLUTION: 3287G

PROBLEM: 4, 9, ['6451', '9261', 's', '5587', 'D', '7595', 'D', 'E', 's', '8841', 'Y']

SOLUTION: sED5957D7855

PROBLEM: 13, 21, ['X', '3727', 'a', '3009', '2407', 'M', '7597', '8295', 'v', 'R', 'a', '3171', 'P', 'Y', 'J', '8899', '7269', '6841', 'Q', '4073', '2123', '3083', 'P', 'y']

SOLUTION:
32123704Q148696279988JYP