For centuries, lighthouses have helped sailors travel safely at night. They a usually bu on ro coasts o small isl, where sh are i danger o hitting la. In t past, a keeper lived at each lighthouse and made sure that its lamp stayed lit through the night. Each lighthouse flashes its light in its own pattern, so sailors can tell which one they are looking at. Today, most lighthouses are fully automatic.

Type only the missing letters. Each box is one letter, and the number of boxes matches the letters that are missing.