#include<bits/stdc++.h>
using namespace std;
int a,b,c,d,e,sum;
int u;
char o[100001];
int main(){
	cin>>o;
	o[strlen(o)]=','; 
	for(int i=0;i<=strlen(o);i++){
		if(o[i]==','){
			if(d==1 && sum>=6 && sum<=12) {
				if((a==1 && b==1) || (a==1 && c==1) || (b==1 && c==1)){
					if(e==0){
						for(int j=u;j<i;j++) cout<<o[j];
						cout<<"\n";
						u=i+1;
					} 
				} 
			}
			sum=a=b=c=d=e=0;	
			continue;
		}	
		if(o[i]>='A' && o[i]<='Z') a=1;
		else if(o[i]>='a' && o[i]<='z') b=1;
		else if(o[i]>='0' && o[i]<='9') c=1;
		else if(o[i]=='#' || o[i]=='!' || o[i]=='$' || o[i]=='@') d=1;
		else e=1;
		sum++;
	}
	return 0;
}