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, ['F', '8137', 'f', 'q', '5553', 'C', '8425', '7193', '4175', 'o', 'L', 'U', '797', '7149', '9891', 'e', '6279', '9071', 'A', 'I', 'N', '479', 'F', 'l', '9113', '2961']

8137fq5553C842571934175oLU79771499891e62799071AIN