In a seven-digit number, the number in the ones place is 7, the number in the tens place is 2, and the sum of any three adjacent numbers is 15. What is the seven-digit number?
一个七位数，个位上的数字是7，十位上的数字是2，任意相邻三个数字的和都是15，这个七位数是多少．
<result>7_627_627</result>