Xiao Ming debugs a newly designed robot that can do somersaults. If it does 16 turns per minute, it will take more than 10 minutes to complete the complete set of movements. If it turns 20 per minute, it will take about 15 minutes to complete the complete set of movements. In order to make the number of somersaults per minute the same as the number of minutes used, it should be adjusted to the appropriate number of somersaults per minute.
小明调试一台新设计的能翻跟头的机器人，如果每分钟翻16个，完成全套动作需要10多分钟，如果每分钟翻20个，完成全套动作需要15分钟左右．为使每分钟翻跟头的个数与所用的分钟数相同，那么应调试成每分钟翻多少个跟头合适．
<result>17</result>