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: 10, 11, ['6929', 'l', '8541', 'L', '7495', '7707', '8839', '6687', 'L', '5125', 'd', 'F', '7', '4357', 'w', 'R', '2459', '9871', 'E', '299', '5967', 'T']

SOLUTION: d5215

PROBLEM: 23, 26, ['c', '2231', 'f', '4261', 'x', '8511', '6147', 'n', 'M', '4859', 'p', '1033', '2031', 'A', 'c', '377', '4309', 'r', '7031', 'i', '3619', '3767', '2001', 'g', 'u', 'C', '341', '4457', 'y', '2221']

SOLUTION:
Cug1002

