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: 13, 13, ['1575', 'D', '1335', '2335', 'D', '9893', 'U', 'j', '5145', '6041', '2655', 'r', '5243', '8745', '7439']

SOLUTION: 3425

PROBLEM: 4, 13, ['1283', 'G', 'U', 'F', '5549', 'n', '565', '2889', 'Z', 'V', '2511', 'g', '6311', 'd', 'Z', 'X', '4305', '5323', 'M', 'z', '5951', 'u', 'A', 'T', 'v', 'z', 'L']

SOLUTION: 1136g1152VZ9882565n9455F

PROBLEM: 4, 10, ['6849', 'V', '7009', 'f', '5251', 'Z', 'S', 'K', 'u', '2791', 'U', 'y', '1595', '2073', '9837', 'j', '8189', '9985', 't', 't', '3151', 'l', 't', 'u', 'C', 'r', 'h', '5909']

SOLUTION:
1972uKSZ1525f