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.
Input: 8, 18, ['6933', '7449', 'I', '3445', 'i', '6033', '5783', '6681', 'D', 'b', '8649', '6909', '3737', '6199', '7845', '6035', 'q', 'F']

6681Db864969093737619978456035qF