Teacher: 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.
Teacher: Now, understand the problem? If you are still confused, see the following example:
6, 14, ['9545', '5185', '1667', 'w', 's', '9559', 'T', 'u', 'U', '6843', 'L', 'l', '6365', '7103', 'A', '2381', '5037', 'X', '4487', 'd']
Solution: 9559TuU6843Ll63657103
Reason: Here, concatenating all the elements between the 6th element and 14th element gives '9559TuU6843Ll63657103'.

Now, solve this instance: 10, 15, ['w', '5009', 'z', '1847', 'g', '8681', '9477', 'j', '8799', '5511', '9667', '8113', 'O', 'p', '6473', 'n', 'g', 'w', '4973', '7137', '6733', '3201', '9589', '5783', 'a', '7711', 'L', 'Q']
Student:
551196678113Op6473