Once upon a time there was a famous sea captain. This captain was very 
successful at what he did; for years he guided merchant ships all over the 
world. Never did stormy seas or pirates get the best of him. He was admired 
by his crew and fellow captains.

However, there was one thing different about this captain. Every morning he 
went through a strange ritual. He would lock himself in his quarters and 
open a small safe. In the safe was an envelope with a piece of paper inside. 
He would stare at
the paper for a minute,then lock it back up. Afterwards, he would go about 
his daily duties.

For years this went on, and his crew became very curious. Was it a treasure 
map? Was it a letter from a long lost love? Everyone speculated about the 
contents of the strange envelope. One day the captain died at sea. After 
laying the captain's body to rest, the first mate led the entire crew into 
the captains quarters.

He opened the safe, got the envelope, opened it and... The first mate turned 
pale and showed the paper to the others. Four words were on the paper; two 
lines with two words each: Port Left / Starboard Right