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: 19, 21, ['A', 'R', 'Q', 'x', '9599', 'Q', '4577', '2745', 'U', '4479', '4111', 'e', '4287', '111', '8425', 'R', 'd', 'F', 'F', '1467', 'w', '9913', 'a']
Student:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
F1467w