Input (grade 13): Fairbanks receives an average 21 hours of daylight between May 10 and August 2 each summer, and an average of less than four hours of daylight between November 18 and January 24 each winter.
Output (grade 6): It is light for about 21 hours every day between May 10 and August 2. It is light less than four hours each day between November 18 and January 24.