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: 18, 19, ['7745', 'u', '4007', '7081', 'f', 'G', '6389', '9397', '1873', '8991', 'p', '8205', '631', '833', '3729', 'l', '6093', '1119', '669', '2319', 'S', 'w', '6585', '6491', 'e', 'B', '8523', '8291', '5365', 'e']

SOLUTION: 1119669

PROBLEM: 5, 15, ['9991', '7119', 'x', '6769', 'r', 'i', 'j', 's', '6449', 'j', 'M', '245', '4129', 'B', 'T', '4827', '9543', 'd', 'l', '1125', 'J', '6057', '1241', '2027']

SOLUTION: rijs6449jM2454129BT

PROBLEM: 12, 20, ['e', '7147', 'b', 'D', '8181', 'W', 'y', '9391', '9593', 'x', '5493', '4653', '3405', '801', 'l', 'X', 'W', 'B', 'U', '9411', 'O', 'X']

SOLUTION:
46533405801lXWBU9411