The school is on the same street as Congcong's and Mingming's homes. Congcong's home is 56 meters away from the school, and Mingming's home is 37 meters away from the school. So, how many meters are there between Congcong and Mingming's homes? How many situations are there? Please list the answers separately.
学校和聪聪、明明他们的家都在同一街道上，聪聪家离学校有56米，从明明家到学校也有37米，那么，聪聪和明明两家相距多少米？有几种情况？请分别列式解答．
<gadget id="calculator">56 - 37</gadget>
<output>19</output>

<result>19</result>