#include<bits/stdc++.h>
using namespace std;
string a;
int s,maxx,minn=109,maxxn,minnn,biao;
int main(){
	getline(cin,a);
	a[a.size()]=' ';
	for(int i=0;i<a.size();i++){
		if(a[i]==' '||a[i]==','){
			s=i+1;
			while(a[s]!=' '&&a[s]!=','){
				biao++;
				s++;
			}
			if(biao>maxx){
				maxx=biao;
				maxxn=i+1;
			}
			if(biao<minn){
				minn=biao;
				minnn=i+1;
			}
		}
		biao=0;
	}
	for(int i=0;i<=109;i++){
		if(a[i]==' '||a[i]==',')break;
		biao++;
	}
	if(biao<=minn){
		minn=biao;
		minnn=0;
	}
	if(biao>=maxx){
		maxx=biao;
		maxxn=0;
		}
	for(int i=maxxn;i<=maxxn+maxx;i++)
		cout<<a[i];
	cout<<"\n";
	for(int i=minnn;i<=minnn+minn;i++)
		cout<<a[i];
	return 0;
}