Mingming’s phone number has eight digits, the number in the tens of millions is 3, the number in the thousands is 8, and the sum of any adjacent three numbers is exactly 20. What is Mingming’s phone number?
明明家的电话号码是八位数，千万位上的数字是3，千位上的数字是8，任意相邻的三个数字的和刚好是20，明明家的电话号码是多少．
<result>38_938_938</result>