The password of a safe is 8 digits, the hundreds digit is 7, the ones digit is 3, and the sum of any adjacent three numbers is 15. What is the password of this safe?
一个保险箱密码是8位数，百位是7，个位是3，任意相邻的三个数字之和是15，这个保险箱的密码是多少．
<result>53_753_753</result>