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? Solve this instance: 20, 20, ['8757', 'U', '8063', 'q', 'u', '5441', 'K', '9457', 'Y', 'J', '5097', '1773', 'u', 'c', '7697', '6941', 't', 'q', 'Z', 'q', '7585', '4909']
Student:
q