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, ['B', 'N', 'X', '393', 'F']

SOLUTION: BN

PROBLEM: 1, 5, ['3123', '67', '6019', '9385', '8251', 'b', 'D', '4957', 'u', '2091']

SOLUTION: 312367601993858251

PROBLEM: 8, 9, ['3779', '3869', '1801', '5475', '5971', 'f', '2735', 'I', 'x', 't', '6695', '7893']

SOLUTION:
Ix