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: 7, 19, ['1899', '4271', 'D', '8199', 'm', '4847', '3631', '7637', '4429', '7541', 'g', '6763', '8281', 'N', '5505', '3547', '2173', 'P', 'R', '655', '4599', 'y', 'Z', '2059', '3229', 'c', '4363', '8351']

SOLUTION: 3631763744297541g67638281N550535472173PR

PROBLEM: 4, 11, ['f', '6311', '3551', 'y', 'w', 'B', '2463', '6183', '7253', '2615', 'o', 'I', 'n', '697', '6649', 'v']

SOLUTION: ywB2463618372532615o

PROBLEM: 7, 21, ['T', '2863', '7481', 'k', '8017', '6231', 'i', '9493', 'i', 'q', 'P', 'j', 'U', '1749', 'N', 'k', 'q', 'E', 'a', 'E', '1557', '507', '2441', 'C', '8217', 'T', '87', '8547']

SOLUTION:
i9493iqPjU1749NkqEaE1557