#include <iostream>
#include <cmath>
#include <algorithm>
#define mult(x,y) ((x-y)*(x-y))

using namespace std;

int func(bool a[101][101], bool vis[101], int n, int s)
{
	int c = 1;
	
	vis[s] = false;
	for(int i = 0; i < n; i++){
		if(a[s][i] && i != s && vis[i]){
			c += func(a, vis, n, i);
		}
	}
	
	return c;
}

int main()
{
	int n, s, t;
	double x[101], y[101], r;
	bool a[101][101], vis[101];
	
	while(1){
		cin >> n;
		if(n == 0){
			break;
		}
		for(int i = 0; i < n; i++){
			scanf("%lf,%lf", &x[i], &y[i]);
		}
		fill(vis, vis+n, true);
		fill(&a[0][0], &a[n][n], false);
		for(int i = 0; i < n; i++){
			for(int j = i; j < n; j++){
				r = sqrt((mult(x[i], x[j])+mult(y[i], y[j])));
				if(2.0 >= r){
					a[i][j] = a[j][i] = true;
				}
			}
		}
		
		t = 0;
		for(int i = 0; i < n; i++){
			if(vis[i]){
				s = func(a, vis, n, i);
				if(s > t){
					t = s;
				}
			}
		}
		
		cout << t << endl;
	}
	
	return 0;
}