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, 17, ['P', '9275', '2025', '6709', 'd', 'j', '745', 'F', 'd', 'T', 'w', 'E', '2915', 'g', 'E', 'r', '8951']

SOLUTION: 1598rEg5192EwTdF547

PROBLEM: 3, 3, ['5819', '3317', '451', '5811']

SOLUTION: 154

PROBLEM: 11, 18, ['F', '1761', 'F', 'o', '4457', '8777', '4953', '2411', 'h', 'i', '1167', 'u', 'e', '4269', 'A', '7149', 'M', 'I', '4107', '1977', '5175']

SOLUTION:
IM9417A9624eu7611