What is the lullaby for the dog on poptropica mythology island?

In Poptropica's Mythology Island, the lullaby for the dog is a special song that you need to sing to calm Cerberus, the three-headed dog. To do this, you must find the correct notes to play on a musical instrument, which can be found in the game. Once you have the right melody, singing it will help put Cerberus to sleep, allowing you to progress in the quest. The lullaby is a crucial part of solving the challenges on the island.