12543

#include <iostream>
#include <string>
#include <math.h>


using namespace std;

int main()
{
    string s,maxStr,a;
    int max_=0;
    int len=0;
    maxStr="";
    while(cin>>s)
    {
       if(s=="E-N-D")
       break;

       len=0;
       a="";
       for(int i=0;i<s.size();i++)
       {
         if((s[i]>='a' && s[i]<='z') || (s[i]>='A' && s[i]<='Z') || s[i]=='-')
         {
           len++;
           if(s[i]>='A' && s[i]<='Z')
           a.append(1u,s[i]+32);
           else
           a.append(1u,s[i]);
         }
       }

       if(len>max_)
       {
          max_=len;
          maxStr=a;
       }
    }
    cout<<maxStr<<"\n";
    return 0;
}