myperror

#include<iostream>
#include<iomanip>
#include<cmath>
#include<string>
#include<algorithm>
#include<cstring>
#include<cstdio>
using namespace std;
int main() {
	float A, B;
	double C, D;
	cin >> A >> B;
	cin >> C >> D;
	printf("A = %.6f, B = %.6f\n", A, B);
	printf("C = %.6f, D = %.6f\n", C, D);
	cout << fixed << setprecision(1);
	cout << "A = " << A << ", B = " << B << endl;
	cout << "C = " << C << ", D = " << D << endl;
	cout << fixed << setprecision(2);
	cout << "A = " << A << ", B = " << B << endl;
	cout << "C = " << C << ", D = " << D << endl;
	cout << fixed << setprecision(3);
	cout << "A = " << A << ", B = " << B << endl;
	cout << "C = " << C << ", D = " << D << endl;
	cout << scientific << setprecision(3);
	cout << "A = " << A << ", B = " << B << endl;
	cout << "C = " << C << ", D = " << D << endl;
	cout << fixed << setprecision(0);
	cout << "A = " << A << ", B = " << B << endl;
	cout << "C = " << C << ", D = " << D << endl;
	return 0;
}