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: 3, 15, ['O', 'a', '6377', 'R', '1363', '8013', '1923', '4039', 'j', '1365', 'E', 'P', '7225', '7813', 'I']

SOLUTION: I31875227PE5631j9304329131083631R7736

PROBLEM: 4, 11, ['H', 'E', 'l', '5011', 'R', '2693', '1081', '9825', '8503', '213', '2717', '8335', '3355', 'd', '7727', '3417', 'R', 'V', 'e']

SOLUTION: 71723123058528918013962R1105

PROBLEM: 13, 22, ['7395', '1707', '4205', '2693', 'Q', 't', 't', '6887', '7265', 'y', 'Q', 'k', 'c', '9633', 'T', 'P', 'L', '6555', '621', 'o', '7329', 'Z', '1931', 'E', '3025', 'p', 'b', '6589']

SOLUTION:
Z9237o1265556LPT3369c