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: 8, 11, ['F', '8031', '1539', '6973', '3103', 'I', '9639', 'm', 'x', 'j', '9811']

SOLUTION: mxj9811

PROBLEM: 13, 15, ['e', '7179', 'W', 'k', '9187', 'l', 'w', '4171', '4091', 'C', '8441', 'P', 'b', '6177', '9279', 'L']

SOLUTION: b61779279

PROBLEM: 12, 16, ['o', '7771', 'u', 'S', '9599', '4091', 'q', '6679', '3467', '5619', 'L', '6577', '8237', '7201', '2563', '8189', 'j', 'F', '7231', '4353', 'B', '4857', 'f', '7017', 'G', '8233', 'M', '1301', '1785']

SOLUTION:
65778237720125638189