#include <iostream>
#include <string>

using namespace std;

/*
 *
 */
int main(int argc, char** argv) {
    int test_cases;
    char type_of_baloon;
    int result=0;

    while(cin>>test_cases)
    {
        string *inputs = new string[test_cases];
        string *t_f = new string[test_cases];
        //geting input for current group
        for(int i =0;i<test_cases;i++)
        {
            cin>>inputs[i];
            //cout<<"line "<<i<<"entered successfuly\n";
            //fill t_f[i]
            t_f[i]="";
            for(int a=1;a<=9;a++)
            {
                if(a==1){type_of_baloon='1';}
                else if(a==2){type_of_baloon='2';}
                else if(a==3){type_of_baloon='3';}
                else if(a==4){type_of_baloon='4';}
                else if(a==5){type_of_baloon='5';}
                else if(a==6){type_of_baloon='6';}
                else if(a==7){type_of_baloon='7';}
                else if(a==8){type_of_baloon='8';}
                else if(a==9){type_of_baloon='9';}


                /*switch a

                case 1: type_of_baloon = '1';
                case 2: type_of_baloon = '2';
                case 3: type_of_baloon = '3';
                case 4: type_of_baloon = '4';
                case 5: type_of_baloon = '5';
                case 6: type_of_baloon = '6';
                case 7: type_of_baloon = '7';
                case 8: type_of_baloon = '8';
                case 9: type_of_baloon = '9';

                cout<<"switched "<<type_of_baloon<<endl;*/
                if(inputs[i].find(type_of_baloon)!=string::npos)
                {
                    t_f[i]+="T";//it exists
                }
                else
                {
                    t_f[i]+="F";
                };
                //cout<< "true false is "<< t_f[i]<<endl;
            };
        };
        //finding results
        for(int i = 0; i<test_cases;i++)
        {
            if(t_f[i]!="none")
                {
            {
                for(int a=0;a<test_cases;a++)
                    if(a!=i&&t_f[i]==t_f[a]){t_f[a]="none";};
                }
                result++;
                t_f[i]="none";
            };
        };
        cout<<result<<endl;

        result = 0;
        delete[]t_f;
        delete[]inputs;

    };

    return 0;
}