#include <bits/stdc++.h>
using namespace std;
int main()
{
	string s;
	int xiao=0,da=0,shu=0,fu=0,p=0,k=0;
	cin>>s;
	for(int i=0;i<100;i++){
		if(s[i]>='a'&&s[i]<='z')
			xiao++;
		else if(s[i]>='A'&&s[i]<='z')
			da++;
		else if(s[i]>='0'&&s[i]<='9')
			shu++;
		else if(s[i]=='!'||s[i]=='@'||s[i]=='#'||s[i]=='$')
			fu++;
		else if(s[i]==','){
			if(xiao+da+shu+fu>=6&&xiao+da+shu+fu<=12&&k!=1){
				if((xiao>0&&da>0)||(xiao>0&&fu>0)||(da>0||fu>0)){
					for(p=i-xiao-da-fu-shu;p<i;p++){
						cout<<s[p];
					}
					cout<<endl;
					xiao=0,shu=0,da=0,fu=0,k=0;
				}
				else xiao=0,shu=0,da=0,fu=0;
			}
			else xiao=0,shu=0,da=0,fu=0;
		}
		else k=1;		
	} 
	return 0;
}

求大佬调