import java.io.*;
class ComplexNumber{
    long Rez,Imz;
    ComplexNumber(double a,double b){
        Rez=(long)a;
        Imz=(long)b;
    }

    ComplexNumber Add(ComplexNumber x){
        ComplexNumber result=new ComplexNumber(0,0);
        result.Rez=(x.Rez+Rez);
        result.Imz=(x.Imz+Imz);
        return result;
    }

    ComplexNumber Sub(ComplexNumber x){
        ComplexNumber result=new ComplexNumber(0,0);
        result.Rez=(Rez-x.Rez);
        result.Imz=(Imz-x.Imz);
        return result;
    }

    double GetRez(){
        return Rez;
    }

    double GetImz(){
        return Imz;
    }

    void print (){
        String mySign="";
        if (Imz>=0) mySign="+";
        System.out.println(Rez+mySign+Imz+"i");
    }
}
public class Fushu {
    public static void main(String args[]) throws IOException{
        System.out.println("請輸入第一個復數的實部與虛部(a,b)");
        BufferedReader buf=new BufferedReader(new InputStreamReader(System.in));
        String readStr=buf.readLine();//以上兩句是從鍵盤獲得輸入的字符
        String argStr1[]=readStr.split(",");//split用來分割“,”的..返回數組類型
        ComplexNumber myComplexNum1 = new ComplexNumber(Double.parseDouble(argStr1[0]),Double.parseDouble(argStr1[1]));
        System.out.println("實部："+myComplexNum1.GetRez()+",虛部："+myComplexNum1.GetImz());
      
        System.out.println("請輸入第二個復數的實部與虛部(a,b)");
        buf=new BufferedReader(new InputStreamReader(System.in));
        readStr=buf.readLine();
        String argStr2[]=readStr.split(",");
        ComplexNumber myComplexNum2 = new ComplexNumber(Double.parseDouble(argStr2[0]),Double.parseDouble(argStr2[1]));
        System.out.println("實部："+myComplexNum2.GetRez()+",虛部："+myComplexNum2.GetImz());
      
        System.out.println("兩復數分別為：");
        myComplexNum1.print();
        myComplexNum2.print();
        System.out.print("兩復數相加:");
        myComplexNum1.Add(myComplexNum2).print();
        System.out.print("兩復數相減:");
        myComplexNum1.Sub(myComplexNum2).print();
    }
}