#include <cstdio>
#include <cmath>

using namespace std;

int main(){
	set<quad> s;
	for (float i=0; i<20; i+=0.01)
		for (float j=i; j<20; j+=0.01)
			if (i+j<20)
				for (float k=j; k<20; k+=0.01)
					if (i+j+k < 20){
						float l=(i+j+k)/(i*j*k-1);	
						if (l>=0 && i+j+k+l<20 && l>=k)
							printf("%.2f %.2f %.2f %.2f\n", i, j, k, l);
					}
	return 0;
}