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import java.io.*;
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class Main{
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    public static void main(string[] args){
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        //创建输入缓冲流BufferedReader
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        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
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        //
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        StreamTokenizer in = new StreamTokenizer(br);
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        //创建输出缓冲流PrintWriter
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        PrintWriter out = new PrintWriter(new OutputStreamWriter(System.out));
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        while (in.nextToken() != StreamTokenizer.TT_EOF){
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            int A = (int) in.nval;
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            in.nextToken();
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            int B = (int) in.nval;
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            out.println(A+B);
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        }
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        out.flush();
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        out.close();
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    }
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}

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import java.io.*;
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class Main{
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  public static void main(String[] args) throws IOException {
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      //创建输入缓冲流BufferedReader
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        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
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        //创建输出缓冲流PrintWriter
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        PrintWriter out = new PrintWriter(new OutputStreamWriter(System.out));
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        String line;
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        while ((line = br.readLine())!=null){//readLine将一行数据包括空格传给string
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            String[] parts = line.split(" ");//字符串分割后得到字符串数组
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            int sum = 0;
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            for (String num : parts) {
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                sum += Integer.valueOf(num);//将字符串数组进行类型转换装箱使用
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            }
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            out.println(sum);
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        }
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        out.flush();
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        out.close();
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    }
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}