Use the seven numbers 1, 2, 3, 4, 5, 6, and 7 to form three two-digit numbers and one single-digit number, and make the sum of these four numbers equal to 100. If the smallest two-digit number is required as much as possible small, what is the largest two-digit number among them?
用1，2，3，4，5，6，7这七个数字组成三个两位数，一个一位数，并且使这四个数的和等于100，如果要求最小的两位数尽可能小，那么其中最大的两位数是多少．
<result>47</result>