wa,0分求助

#include<bits/stdc++.h>
using namespace std;
int main()
{
    string s;
    bool u=true;
    cin>>s;
    int flg1=0,flg2=0,flg3=0,flg4=0,len=0,cnt=0;
    for(int i=0;i<s.length();i++)
    {
        if(s[i]==',')
        {

            if((flg1==1&&flg2==1)||(flg2==1&&flg3==1)||(flg1==1&&flg3==1))
            {
                if(flg4==1&&u)
                {
                    for(int j=cnt;j<i;j++)cout<<s[j];
                    cout<<"\n";
                }
            }
            cnt=i+1;
            flg1=0,flg2=0,flg3=0,flg4=0,len=0;
            u=true;
        }
        len++;
        if(s[i]>='a'&&s[i]<='z') flg1=1;
        else if(s[i]>='A'&&s[i]<='Z')flg2=1;
        else if(s[i]>='0' and s[i]<='9')flg3=1;
        else if(s[i]=='!'||s[i]=='@'||s[i]=='#'||s[i]=='$')flg4=1;
        else if(s[i]!=',')u=false;
    }
    return 0;
}