#include<bits/stdc++.h>
using namespace std;
bool f[5];

int num = 0;
string s;
int main(){
	cin >> s;
	int sum = 0;
	bool fe = false;
	int j = 1;
	for(int i = 0; i <= s.size(); i++){
		string c;
		if(s[i] != ','){
			c[j] += s[i];
			j++;
			num ++;
			if(s[i] >= 'a' && s[i] <= 'z'){
				f[0] = true;
			}else if(s[i] >= 'A' && s[i] <= 'Z'){
				f[1] = true;
			}else if(s[i] >= '0' && s[i] <= '9'){
				f[2] = true;
			}else if(s[i] == '!' || s[i] == '@' || s[i] == '#' || s[i] == '$'){
				f[3] = true;
			}
		}else{
			for(int t = 0; t <4; t++){
				if(f[j] == true){
					fe = true;
				}else{
					fe = false;
				}
				f[i] = 0;
			}
			if(num >= 6 && num <= 12){
				fe = true;
			}else{
				fe = false;
			}
			if(fe == true){
				sum ++;
			}
			num = 0;
			j = 1;
		}
		if(fe == true){
			cout << c;
		}
	}
	return 0;
} //!@#$