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: 7, 9, ['w', 'L', '7649', 's', 'D', '45', 'L', 'O', 'H', '2781', '6883', 'h']

SOLUTION: HOL

PROBLEM: 6, 8, ['J', '4955', '3497', '8869', 'n', '2093', '6249', 'A', '8957']

SOLUTION: A94263902

PROBLEM: 2, 3, ['7795', '7879', '2659']

SOLUTION:
95629787