#include <bits/stdc++.h>
using namespace std;
int main()
{
	string s,str="";
	getline(cin,s);
	int len=s.size(),i=0;
	for(char t:s){
		i++;
		if(t!=','){
			str+=s;
		}
		else if(t==','){
			if((str.size()<=12 && str.size()>=6) && (str[i]<='z' && str[i]>='a') && (str[i]<='Z' && str[i]>='A') && (str[i]<='9' && str[i]>='0') && (str[i]=='!' || str[i]=='@' || str[i]=='#' || str[i]=='$')){
				cout<<str <<endl;
			}
			str="";
		}
	}
    return 0;
 }