/*
欧拉计划第102题
判断原点在三角形内部还是外部.
使用面积法 S(ABP) + S(ACP) + S(BCP) > S(ABC) 则说明 P 在三角形外
否则说明,点在三角形内。(进一步可以判定点在线上与否)
面积采用叉积法
AB = (x1, y1), AC = (x2, y2)
则 S(ABC) = abs(x1 * y2 + x2 * y1) / 2.0
*/
#include<bits/stdc++.h>
using namespace std;
typedef pair<int, int> PII;
#define x first
#define y second
using namespace std;
double area(PII A, PII B, PII C)
{
int x1 = B.x - A.x;
int y1 = B.y - A.y;
int x2 = C.x - A.x;
int y2 = C.y - A.y;
return fabs(x1 * y2 - x2 * y1) / 2.0;
}
bool check(PII A, PII B, PII C)
{
PII O = {0, 0};
double S1 = area(A, B, O);
double S2 = area(A, C, O);
double S3 = area(B, C, O);
double S = area(A, B, C);
return S1 + S2 + S3 <= S;
}
int main(void)
{
int ans = 0;
PII A, B, C;
while(scanf("%d,%d,%d,%d,%d,%d", &A.x, &A.y, &B.x, &B.y, &C.x, &C.y) != EOF)
{
if (check(A, B, C)) ans ++;
}
cout << ans << endl;
return 0;
}