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: 2, 17, ['6659', 'U', 'L', '669', '8949', '7717', '5853', '5849', 'A', 'f', 'H', '6459', 'j', '7877', 'j', '5717', 'w']

UL6698949771758535849AfH6459j7877j5717w