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: 19, 28, ['2809', '2943', '209', 'I', '4961', 'z', '6499', 'j', '8323', 'v', '6955', 'E', '2591', '5523', 'D', 'j', '3929', 'L', '501', 'Y', 'e', 'p', 'F', '1073', 'o', '3531', '9245', 'K']

SOLUTION: K54291353o3701FpeY105

PROBLEM: 13, 15, ['L', 'A', '2959', 'g', '7157', '9131', 'o', 'D', 'q', 'd', 'A', '4249', 'K', 'U', '4805', 'h', '7981']

SOLUTION: 5084UK

PROBLEM: 11, 20, ['7877', 'H', '8151', '3041', 'O', 'X', '4431', 'W', 'l', 'S', '7091', 'T', 'C', '8953', 'p', 'G', '5373', 'V', '2729', 'S']

SOLUTION:
S9272V3735Gp3598CT1907

