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: 3, 4, ['8681', '2115', '9305', '2451']

SOLUTION: 93052451

PROBLEM: 6, 6, ['6237', '5511', '7211', '1509', '7331', '9547']

SOLUTION: 9547

PROBLEM: 1, 2, ['6129', 'r']

SOLUTION:
6129r