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, 21, ['85', '1903', 'W', 'j', 't', '8871', 'u', 'L', 'I', '9609', '3095', '6927', '8013', 'u', 'Q', '7265', 'E', 'k', 'F', '5989', 'P', 'Y']

1903Wjt8871uLI9609309569278013uQ7265EkF5989P