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: 4, 5, ['4873', '1787', '4759', '5699', 'f', 'e', '3343', 'f', 'w', 'u', 'm', '3135', 'u', 'U', 'W', 'a', 'Y']

5699f