From the six numbers 1 to 6, how many ways are there to take two numbers each time to make their sum greater than 6?
从1～6这六个数中，每次取两个数，要使它们的和大于6，有多少种取法？
<gadget id="calculator">1 + 2 + 1 + 2 + 2 + 1</gadget>
<output>9</output>

<result>9</result>