I throw two of the items away.
I want to divide it into different groups, but I can only see one half of each item in my hands.
I can easily divide the items into the same amount of groups:
- as there are day and night.
as there are seasons.
as there are lunar months.
as there are weeks in the year.
I get the amount of days in a year (minus 1 for the two items I threw away.)
What do I have?