#include<bits/stdc++.h>
using namespace std;
int main()
{
	string s;
	cin>>s;
	int l=s.size();
	for(int i=0;i<l;i++)
	{
		if(s[i]==',') continue;
		int j=i;
		while(j<l&&s[j]!=',') j++;
		j--;
		string s1=s.substr(i,j-i+1);
		bool f=true;
		if(s1.size()<6||s1.size()>12)
		{
			f=false;
		}
		//cout<<f<<endl;
		bool c1=0,c2=0,c3=0,c4=0;
		int s4=0;
		for(int i=0;i<s1.size();i++)
		{
			if(s1[i]>='A'&&s1[i]<='Z')
			{
				c1=1;
			}
			else if(s1[i]>='a'&&s1[i]<='z')
			{
				c2=1;
			}
			else if(s1[i]>='0'&&s1[i]<='9')
			{
				c3=1;
			}
			else if(s1[i]=='@'||s1[i]=='!'||s1[i]=='#'||s1[i]=='$')
			{
				c4=1;
			}
			else{
				f=false;
			}
		}
		//cout<<c1<<" "<<c2<<" "<<c3<<" "<<f<<endl;
		s4=c1+c2+c3;
		if((s4>=2&&c4>=1)&&f)
		{
			cout<<s1<<endl;
		}
		i=j;	
	}
	return 0;
}