//seHJ12!@,sjdkffH$123,sdf!@&12HDHa!,123&^YUhg@!,1444444444442#hA
#include<bits/stdc++.h>
using namespace std;
int main()
{
	char a[100]={};
	cin>>a;
	int t=0,t1=0,t2=0,t3=0;
	int k=0;
	int s=0;
	for (int i=0;i<strlen(a);i++)
	{
		if(a[i]==',')
		{
			if(t+t1+t2>=2 && t3==1 && k-s<=12 && k-s>=6)
			{
				for(int j=s;j<=k-1;j++)
				{
					cout<<a[j];
				}
				s=k+1;
				cout<<endl;
			}
			k+=1;
			t=0,t1=0,t2=0,t3=0;
		}
		else
		{
			if(a[k]>='a' && a[k]<='z')
			t=1;
			if(a[k]>='A' && a[k]<='Z')
			t1=1;
			if(a[k]>='0' && a[k]<='9')
			t2=1;
			if(a[k]=='!' || a[k]=='@' || a[k]=='#' || a[k]=='$')
			t3=1;
			k++; 
		}	
	 } 
}