#include<bits/stdc++.h>
using namespace std;
int main(){
    int sum=0,maxn=-1,maxb,minn=100000000,minb;
    string s;
    getline(cin,s);
    for(int i=0;i<=s.length()-1;i++){
        if(s[i]==' '||s[i]==','||s[i]=='.'){
            if(sum>maxn){
                maxb=i;
                maxn=sum;
            }
            if(sum<minn){
                minb=i;
                minn=sum;
            }
            sum=0;
        else
        sum++;
        }
        for(int i=maxb-maxn;i<maxb;i++)
        cout<<s[i];
        cout<<endl;
        for(int i=minb-minn;i<minb;i++)
        cout<<s[i];
    }
    
    
    
    
    
    
    
    
}