There are four identical bottles containing different weights of wine, and each bottle is weighed together with other bottles, and the weights are 8, 9, 10, 11, 12, and 13 kilograms respectively. It is known that the sum of the weights of the four empty bottles and the sum of the weights of the wine are prime numbers, how many kilograms of wine are there in the two heaviest bottles?
有四个相同的瓶子里分别装有不同重量的酒，每瓶与其他各瓶分别合称一次，重量分别是8，9，10，11，12，13千克．已知4只空瓶重量之和及酒的重量之和均是质数，问最重的两瓶内共有多少千克酒．
<gadget id="calculator">2 / 4</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) * 2</gadget>
<output>1</output>

<gadget id="calculator">13 - 1</gadget>
<output>12</output>

<result>12</result>