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, 10, ['7991', 'T', '5207', 'O', 's', 'j', '8511', '3333', 'w', 'Y', 'R', 't', 'N', '9879']

85113333wY