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 concatenate all elements of A from the ith element to the jth element, and print 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.
PROBLEM: 1, 2, ['1723', '6539']

SOLUTION: 17236539

PROBLEM: 10, 12, ['6999', '2223', '7751', 'b', '1379', 'e', 'v', '6749', 'k', '6697', '9', 'K', '5093']

SOLUTION: 66979K

PROBLEM: 6, 7, ['c', '7317', 'Q', '8265', '1269', 'n', '9587', 'X']

SOLUTION:
n9587