TASK DEFINITION: In this task, you are given inputs i, j, and A, where i and j are integers and A is a list. You need to find all elements of A from the ith element to the jth element, reverse the order in which they occur, and then concatenate them to output the resultant 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 concatenate the elements and then reverse the string.
PROBLEM: 10, 20, ['7655', 'T', 'i', 'R', 'O', 'y', '2217', '7443', '2467', 'k', '5471', 'e', 'z', 'x', 't', '4181', 'd', 'r', '2879', 'j', '8981', 'y', 'T', 'Y', 'R']

SOLUTION: j2879rd4181txze5471k

PROBLEM: 1, 1, ['U', 'R']

SOLUTION: U

PROBLEM: 25, 25, ['8755', 'G', 'K', '8197', 'm', 'r', 'C', '8471', '6453', '4641', 'n', '1609', 'N', '5577', '2637', '999', '2889', '8509', '1617', 'w', 'f', 'D', 'K', 'z', 'b']

SOLUTION:
b