Use the story to answer the question.

The First Fire

Now there is fire in all rocks, in all sticks. But long ago there wasn't any fire in the world, and all the Yaquis and the animals and the creatures of the sea, everything that lived, gathered in a great council in order to understand why there was no fire.

They knew that somewhere there must be fire, perhaps in the sea, maybe on some islands, or on the other side of the sea. For this reason, Bobok, the Toad, offered to go get this fire. The Crow offered to help him and also the Roadrunner and the Dog. These four, the winged animals and the dog went along to help. But Bobok, the Toad, alone, knew how to enter the water of the sea and not die.

The God of Fire would not permit anyone to take his fire away. For this reason, he still sends thunderbolts and lightning at anyone who carries light or fire. He is always killing them.

But Bobok entered the house of the God of Fire and stole the fire. He carried it in his mouth, traveling through the waters. Lightning and thunder made a great noise and many flashes. But Bobok came on, safe beneath the waters. Then there formed on the flooding water, little whirlpools of water full of rubbish and driftwood.

What did Bobok, the Toad, do in order to obtain fire?