#include<bits/stdc++.h>
using namespace std;
const int N=2e5+5;
long long a[10000],chang,d,x,shu,teshu;
string s;
int main(){
	cin>>s;
	int l=s.size();
	int b=0,e=-1;
	for(int i=0;i<l;i++){
		e++;
		chang++;
		if(s[i]>='A'&&s[i]<='Z') d=1;
		if(s[i]>='a'&&s[i]<='z') x=1;
		if(s[i]>='0'&&s[i]<='9') shu=1;
		if(s[i]=='$'||s[i]=='#'||s[i]=='@'||s[i]=='!')teshu++;
		if(s[i]==','||e==l){
			if(chang<6||chang>12||(d+x+shu)<2||teshu==0){
				chang=0;
				d=0;
				x=0;
				shu=0;
				teshu=0;
				continue;
			}
			else{
				if(e+1!=l)e--;
				for(int j=b;j<=e;j++){
					cout<<s[j];
				}
				cout<<endl;
				e++;
				chang=0;
				d=0;
				x=0;
				shu=0;
				teshu=0;
				b=e+1;
			}
		}
	}
	return 0;
}