A nine-digit number has 3 in the thousands place and 6 in the tens place, and the sum of any three adjacent numbers is 17. What is the nine-digit number?
一个九位数，它的千位上是3，十位上是6，而且任意相邻三个数位上的数字之和都是17，这个九位数是多少．
<result>863_863_863</result>