nce upon a time, a magic market sold one thousand beans. A wizard with a blue hair buys the one thousand beans. Nine hundred and ninety of them are pink beans and ten of them are blue beans.

The wizard throw the blue beans to the magical sea. Two minutes later, his beans become a big monster, so he had no choice, but to throw the other beans outside and the monster suddenly dissappeared.

So the wizard never buys any more blue beans and he always buys one thousand pink beans a day.