#include <iostream>
#include <string>
#include<istream>
using namespace std;
class Fraction {
public:
Fraction(int numerator, int denominator);
string toString();

double toDouble();



Fraction plus(Fraction that);
Fraction minus(Fraction that);
Fraction times(Fraction that);
Fraction by(Fraction that);

private:  int numerator;  int denominator;
	   void reduce(int num, int den) {
		   int x = num + den;
		   for (int i = x; i > 0; i--) {
			   if (num % i == 0 && den % i == 0){
				   num = num / i;
				   den = den / i;
			   }
		   }
	   };
};
Fraction::Fraction(int numerator, int denominator) {
	this->numerator = numerator;
	this->denominator = denominator;
}

Fraction Fraction::plus(Fraction that) {
	int num = this->numerator + that.denominator;
	int den = this->denominator + that.denominator;
	Fraction result(num, den);
	result.reduce(num, den);
	cout << "add" << result<< endl;
	return result;
}
Fraction Fraction::minus(Fraction that) {
	int num = this->numerator - that.denominator;
	int den = this->denominator - that.denominator;
	Fraction result(num, den);
	result.reduce(num, den);
	cout << "minus" << result << endl;
	return result;
}
Fraction Fraction::times(Fraction that) {
	int num = this->numerator * that.denominator;
	int den = this->denominator * that.denominator;
	Fraction result(num, den);
	result.reduce(num, den);
	cout << "times" << result << endl;
	return result;
}
Fraction Fraction::by(Fraction that) {
	int num = this->numerator / that.denominator;
	int den = this->denominator / that.denominator;
	Fraction result(num, den);
	result.reduce(num, den);
	cout << "by" << result << endl;
	return result;
}
string Fraction::toString() {
	int x = 0;
	if (numerator > denominator) {
		int a = numerator / denominator;
		for (int i = 0; i < a; i++) {
			numerator -= denominator;
			x += 1;
		}
	}
	string y = "";
	if (x > 0) {
		y += to_string(x);
	}
	y += " ";
	y += to_string(numerator);
	y += "/";
	y += to_string(denominator);
	return y;

}
double Fraction::toDouble() {
	if (denominator < 0) {
		numerator = numerator * -1;
		denominator = denominator * -1;
	}
	return numerator, denominator;
}

int main(void){
	int x, y;
	string input = "";
	getline(cin, input);
	sscanf_s(input.c_str(), "%d / %d", &x, &y);
	Fraction fraction(x, y);
	int x1, y1;
	getline(cin, input);
	sscanf_s(input.c_str(), "%d / %d", &x1, &y1);
	Fraction fraaction(x1, y1);

}