Xiaoying boils water for the guests to make tea. It takes 1 minute to wash the kettle, 15 minutes to boil the water, 1 minute to wash the teapot, 1 minute to take the tea leaves, and 5 minutes to wash the teacups. In order to make the guests drink tea early, at least how many minutes.
小英给客人烧水沏茶，洗水壶要用1分钟，烧开水用15分钟，洗茶壶用1分钟，拿茶叶用1分钟，洗茶杯用5分钟，为了使客人早点喝上茶，最少需要多少分钟．
<gadget id="calculator">1 + 15</gadget>
<output>16</output>

<result>16</result>