#include<iostream>
#include<string>
using namespace std;
int main()
{
string s1;
getline(cin,s1);
int pos=s1.rfind(" ");
int len=s1.size()-pos-1; //s1总长度减去倒数第一个空格前面的,在减去空格就是后面单词的长度
cout<<len<<endl;
}
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