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, ['h', 'B']

SOLUTION: hB

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

SOLUTION: 66979K

PROBLEM: 6, 18, ['D', '3095', 'u', '2197', '1917', 'f', 'D', 'I', 'c', '6557', '3389', 'h', '3667', '6489', '2987', '9129', 'E', 't']

SOLUTION:
fDIc65573389h3667648929879129Et