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: 6, 7, ['1277', '1589', 'Z', 'U', '507', '4913', 'g', '4789']

SOLUTION: 4913g

PROBLEM: 1, 2, ['3877', '2107']

SOLUTION: 38772107

PROBLEM: 2, 2, ['1485', '5683']

SOLUTION:
5683