For a two-digit number, the sum of the ones and tens digits is 9. If the ones and tens digits of this two-digit number are reversed, the new two-digit number is 9 greater than the original two-digit number. Find The original two digits.
一个两位数，个位和十位上的数字之和为9，如果把这个两位数的个位与十位上的数字对调，新的两位数比原来的两位数大9，求原来的两位数．
<result>45</result>