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: 7, 7, ['W', '8635', '1683', 'M', '6699', 'i', '4285', 'G', 'e', 'b', 'r', 'm']

4285