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, 9, ['R', 'j', 'U', '9389', '8533', '6445', '3967', 'k', '821', 'n', '8535', '3531', 'G', '9267', '5723', 'r', '9171', 'l', 'H', 'Z', 'I', '8825', '5573', 'S', '2023']

3967k821