#include<bits/stdc++.h>
using namespace std;
string s,c,c2,maxn,minn;
int j,maxl,minl=1e9;
int main(){
	getline(cin,s);
	for(int i=0;i<s.size();i++){
		if((s[i]>='a'&&s[i]<='z')||(s[i]>='A'&&s[i]<='Z')) c+=s[i];
		if(s[i]==' '||s[i]==','){
			if(c.size()>maxl) maxl=c.size(),maxn=c;
			if(c.size()<minl) minl=c.size(),minn=c;
			c="";
		}
	} 
	cout<<maxn<<endl<<minn;
	return 0;
}

真的气死我这个绿名蓝名蒟蒻了