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: 12, 18, ['N', '9555', 'H', 'd', '7941', 'U', '1965', 'G', 'E', '6947', 'q', '2341', '7909', 'n', '8625', 'r', 'M', 'F']

SOLUTION: FMr8625n79092341

PROBLEM: 3, 8, ['A', '4235', 'w', 'y', '4877', 'M', 'Z', '4403', '969', '4749', 'n', 'x']

SOLUTION: 4403ZM4877yw

PROBLEM: 2, 3, ['3691', 'k', '661', 'y']

SOLUTION:
661k