code:

#include<bits/stdc++.h>
using namespace std;
struct poi{
    double x,y;
    bool operator==(poi t){
        return x==t.x&&y==t.y;
    }
};
double dist(poi x,poi y){
    return sqrt((x.x-y.x)*(x.x-y.x)+(y.y-x.y)*(y.y-x.y));
}
double heron(poi x,poi y,poi z){
    double l,a,b,c;
    a=dist(x,y);
    b=dist(y,z);
    c=dist(x,z);
    l=(a+b+c)/2;
    return sqrt(l*(l-a)*(l-b)*(l-c));
}
bool OnSegment(poi a,poi b,poi c){
    //点A和点B是线段的端点
    double k,bb;
    if(a.x==b.x){//若线段的表达式为x=(a.x)
        if(c.x==a.x&&(a.y<c.y&&c.y<b.y||b.y<c.y&&c.y<a.y))return 1;
        return 0;
    }
    else{
        k=(a.y-b.y)/(a.x-b.x);
        bb=a.y-k*a.x;
        if(k*c.x+bb==c.y&&(a.y<c.y&&c.y<b.y||b.y<c.y&&c.y<a.y))return 1;
        return 0;
    }
}
int main(){
    poi a,b,c,d;
    scanf("(%lf,%lf)",&a.x,&a.y);
    scanf("(%lf,%lf)",&b.x,&b.y);
    scanf("(%lf,%lf)",&c.x,&c.y);
    scanf("(%lf,%lf)",&d.x,&d.y);
    if(a==d||b==d||c==d){
        cout<<4;
        return 0;
    }
    if(OnSegment(a,b,d)||OnSegment(a,c,d)||OnSegment(b,c,d)){
        cout<<3;
        return 0;
    }
    double s1,s2,s3,s4;
    s1=heron(a,b,c);
    s2=heron(a,b,d);
    s3=heron(a,c,d);
    s4=heron(b,c,d);
    if(s2+s3+s4>s1)cout<<2;
    else cout<<1;
}