```cpp

include[HTML_REMOVED]

include[HTML_REMOVED]

using namespace std;
int main(){
string s,maxs;
getline(cin,s);
int len=s.size(),sum=0,max=0;
maxs=s.substr(0,1);
for(int i=0;i<len;i++){

    if(s[i]!=' '&&s[i]!='.') sum++;
    else if(s[i]==' '||s[i]=='.'){
        if(sum>max){
        max=sum;
        maxs=s.substr(i-sum,sum);
        }
        sum=0;
    }
}

cout<<maxs;
return 0;

}