For a two-digit number, the sum of the number in the tens place and the number in the ones place is 10. If the positions of these two numbers are exchanged, the number obtained will be 36 less than the original number. What is the two-digit number?
一个两位数，十位上的数字与个位上的数字之和是10，如果把这两个数字的位置交换，所得到的数就比原数小36，这个两位数是多少．
<result>73</result>