#include <iostream>
#include <sstream>
#include <string>

using namespace std;

main(){

    string sentance;
    getline(cin,sentance);
    istringstream istr(sentance);
    string word;
    int maxSig=INT_MIN;
    string longest;
    bool check=false;

    while(istr>>word)
    {
        size_t sizeW= word.size();
        string noise;

        for(int a =0;a<sizeW; ++a)
        {
            if(word[a]>='0' && word[a]<='9')
            {
                    continue;
            }

            else{
                noise+=word.at(a);
                check=true;
            }
        }

        int scheck=noise.size();

        if(maxSig<=scheck)
        {
            maxSig=noise.length();

            if(longest>noise || longest.empty()){
                longest=noise;
            }
        }
    }
    if(check==true){
    cout << longest;
    }else
    {
        cout<<"no noise";
    }

return 0;
}