代码：

#include<bits/stdc++.h>
using namespace std;
int main()
{
	int sum=0,sum1=0,sum2=0,sum3=0,sum4=0;
  bool flag=false; 
  string s;
  cin>>s;
    for(int i=0;i<s.size();i++)
      { 
         if(s[i]==',')
         {
         if(flag!=true&&i-sum>=6&&i-sum<=12&&sum1+sum2+sum3>=2&&sum4==1)
		   {
		      for(int j=sum;j<i;j++)
			    cout<<s[j];
				cout<<'\n';
				sum=i+2;	
		   }
		   				flag=false;
				continue;
	     }
		 if(s[i]>='a'&&s[i]<='z')
		 sum1=1;
		 if(s[i]>='A'&&s[i]<='Z')
		 sum2=1;
		 if(s[i]>='0'&&s[i]<='9')    
		 sum3=1;
		 if(s[i]=='!'||s[i]=='@'||s[i]=='#'||s[i]=='$')
		 sum4=1;
		 if(!(s[i]>='a'&&s[i]<='z')&&!(s[i]>='A'&&s[i]<='Z')&&!(s[i]>='0'&&s[i]<='9')&&(s[i]!='!'&&s[i]!='@'&&s[i]!='#'&&s[i]!='$'))
		 flag=true;	
	  }
	  return 0;
}