Problem:

Display the calendar for the winter season (November, December, January, February, March and

April).

Impact:

The calendar dates need to be displayed at the same time

Solution:

cal -3 12 2012 | cal -3 3 2012

does not work because piping will cause the calendar to only show the January to april months

cal -3 12 2012 ; cal -3 3 2012

works because it inputs both the commands into the system which shows all of the calendar months for the winter season