#include<bits/stdc++.h>
using namespace std;
string a;
int s,maxx,minn=109,maxxi,minni;
int main(){
	getline(cin,a);
	a[a.size()]=',';

	for(int i=0;i<=a.size();i++){
		s++;
		if(a[i]==' '||a[i]==','||a[i]=='.'){
			if(s-1>maxx){maxx=s-1;maxxi=i-s;}
			if(s-1<minn){minn=s-1;minni=i-s;}
			s=0;
		}
	}
	for(int i=maxxi+1;i<=maxxi+maxx;i++)
		cout<<a[i];
	cout<<"\n";
	for(int i=minni+1;i<=minni+minn;i++)
		cout<<a[i];
	return 0;
}