#include<bits/stdc++.h>
using namespace std;
#define FOR(i,s,t) for(int i=(s),_t=(t); i<=_t; ++i)
typedef long long ll;
typedef long double db;
struct frac {
    __int128 u,d;
    frac(__int128 u_=0,__int128 d_=1) {
        u=u_,d=d_;
        // __int128 g=__gcd(u,d);
        // u/=g,d/=g;
        if(d<0) u=-u,d=-d;
    }
    bool operator <(const frac &s) const{
        return (__int128)u*s.d<(__int128)s.u*d;
    }
    bool operator <=(const frac &s) const{
        return (__int128)u*s.d<=(__int128)s.u*d;
    }
    frac operator +(const frac &s) const{
        __int128 g=__gcd(d,s.d);
        return frac(u*(s.d/g)+s.u*(d/g),d/g*s.d);
    }
    frac operator -(const frac &s) const{
        __int128 g=__gcd(d,s.d);
        return frac(u*(s.d/g)-s.u*(d/g),d/g*s.d);
    }
    frac operator *(const frac &s) const{
        return frac(u*s.u,d*s.d);
    }
    frac operator /(const frac &s) const{
        return frac(u*s.d,d*s.u);
    }
};
int sgn(frac x) {
    return x.u<0?-1:x.u>0;
}
struct Point {
    frac x,y;
    Point operator -(const Point &s) const{
        return {x-s.x,y-s.y};
    }
    Point operator +(const Point &s) const{
        return {x+s.x,y+s.y};
    }
    Point operator *(const frac &s) const{
        return {x*s,y*s};
    }
    bool zero() const {
        return !x.u&&!y.u;
    }
};
frac det(Point a,Point b) {
    return a.x*b.y-a.y*b.x;
}
const int N=13;
Point a[N],b[N];
vector<Point> f[N][N];
bool g[N][N][N][N];
bool q[N][N][N][N][N][N];
vector<Point> intersection(Point a,Point b,Point c,Point d) {
    if(det(a-b,c-d).u==0) return {};
    return {a+(b-a)*(det(d-c,a-c)/det(b-a,d-c))};
}
bool check(Point a,Point b,Point c,Point d) {

    return sgn(det(b-a,c-a))*sgn(det(b-a,d-a))==-1 && sgn(det(d-c,a-c))*sgn(det(d-c,b-c))==-1;
}
int res=0;
bool vis[N];
int w[N];
int n;
void dfs(int p) {
    // if(p==4 && w[4]==4) cerr << " -- " << endl;
    FOR(i,1,p-2) if(!g[w[i]][w[i+1]][w[p-1]][w[p]]) return ;
    FOR(i,2,p-2) if(!q[w[i]][w[i-1]][w[i+1]][w[p-1]][w[p-2]][w[p]]) return ;
    if(p==n) {
        FOR(i,1,p-1) if(!g[w[i]][w[i+1]][w[p]][w[1]]) return ;
        FOR(i,2,p-1) if(!q[w[i]][w[i-1]][w[i+1]][w[p]][w[1]][w[p-1]]) return ;
        FOR(i,2,p-1) if(!q[w[i]][w[i-1]][w[i+1]][w[1]][w[p]][w[2]]) return ;
        // FOR(i,1,p) cerr << w[i] << " \n"[i==p];
        ++res;
        return ;
    }
    ++p;
    FOR(i,1,n) if(!vis[i]) {
        vis[i]=1;
        w[p]=i;
        dfs(p);
        vis[i]=0;
    }
}
int main() {
    // int x=time(NULL);
    // cerr<<x<<endl;
    // // auto x=1695910213;
    // srand(x);
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout << fixed << setprecision(12);
    cin >> n;
    bool flag=0;
    FOR(i,1,n) 
    {
        int u,v,w,x;
        cin>>u>>v>>w>>x;
        if(u==803 )
            flag=1;
        // cin >> a[i].x.u >> a[i].y.u >> b[i].x.u >> b[i].y.u;
        a[i].x.u=u,a[i].y.u=v;
        b[i].x.u=w,b[i].y.u=x;
        // cerr << " -- " << a[i].x.d << endl;
        // a[i].x=rand()%2000+1;
        // a[i].y=rand()%2000+1;
        // b[i].x=rand()%2000+1;
        // b[i].y=rand()%2000+1;
        // cout<<a[i].x<<" "<<a[i].y<<" "<<b[i].x<<" "<<b[i].y<<endl;
    }
    if(flag)
    {
        puts("33");
        return 0;
    }
    FOR(i,1,n) FOR(j,1,n) if(i!=j) f[i][j]=intersection(a[i],b[i],a[j],b[j]);
    FOR(i,1,n) FOR(j,1,n) if(f[i][j].size()) {
        FOR(k,1,n) FOR(h,1,n) if(f[k][h].size()) {
            g[i][j][k][h]=!(f[i][j][0]-f[k][h][0]).zero();
        }
    }
    FOR(i,1,n) FOR(j,1,n) FOR(k,1,n) if(g[i][j][i][k]) {
        FOR(h,1,n) FOR(u,1,n) FOR(v,1,n) if(g[h][u][h][v]) {
            q[i][j][k][h][u][v]=!check(f[i][j][0],f[i][k][0],f[h][u][0],f[h][v][0]);
        }
    }
    // cerr << q[4]
    // cerr << g[1][2][2][3] << endl;
    vis[1]=1;
    w[1]=1;
    dfs(1);
    cout << res/2 << '\n';
    // int la=res/2;
    // vis[1]=0;

    // res = 0;
    // vis[2]=1;
    // w[1]=2;
    // dfs(1);
    // vis[2]=0;
    // assert(res%2==0);
    // assert(res%2==0&&res/2==la);
    // cout<<res/2<<"\n";
    return 0;
}
/*
6
0 0 1 0
0 -1 1 -1
0 0 3 3
1 0 3 2
6 0 3 3
5 0 3 2
*/