Input (grade 12): Much like sirens, mermaids will sing to people or to gods to enchant them, distracting them from their work and causing people to walk off a ship's deck or to run their ship aground.
Output (grade 11): Much like sirens, mermaids sometimes sing to people and gods and enchant them, distracting them from their work and causing them to walk off the deck or run their ships aground.