int start;
const int thirteen[12]={13,44,72,103,133,164,194,225,256,286,317,347};

inline int conv(int a){
    if(a==1) return 5;
    if(a==2) return 4;
    if(a==3) return 3;
    if(a==4) return 2;
    if(a==5) return 1;
    if(a==6) return 7;
    if(a==7) return 6;
};
int main(){
    cin>>start;
    for(int i=0;i<12;i++){
        if((thirteen[i]-conv(start))%7==0) cout<<i+1<<endl;
    };
    return 0;
}

                              
    