The sum of a two-digit number is 8. After exchanging the number at the tens place with the number at the ones place, the new number obtained is 18 greater than the original number. What is the original number?
一个两位数的数字之和是8，把十位上的数字与个位上的数字交换后，得到的新数比原数大18，原来这个数是多少．
<result>35</result>