Contest Duration: - (local time) (100 minutes) Back to Home
A - 1-2-4 Test /

Time Limit: 2 sec / Memory Limit: 1024 MB

### 問題文

3 問の問題からなる試験があり、それぞれの問題の配点は 1 点、2 点、4 点でした。

すぬけ君は、高橋君と青木君のうち少なくとも一方が解けた問題は解け、 2 人とも解けなかった問題は解けませんでした。

すぬけ君の点数を求めてください。

ただし、この問題の制約下で、すぬけ君の点数は一意に定まる事が証明できます。

### 制約

• 0\leq A,B \leq 7
• A,B は整数

### 入力

A B


すぬけ君の点数を整数で出力せよ。

### 入力例 1

1 2


### 出力例 1

3


よって、すぬけ君は 1 点の問題と 2 点の問題を正解し、高橋君と青木君がともに解けなかった 4 点の問題はすぬけ君も解けなかったことになるので、3 点を取ったことがわかります。よって、3 を出力します。

### 入力例 2

5 3


### 出力例 2

7


よって、3 問すべてについて、高橋君と青木君の少なくとも一方が正解しているため、すぬけ君はすベての問題に正解し、7 点を取ったことがわかります。 よって、7 を出力します。

### 入力例 3

0 0


### 出力例 3

0


Score : 100 points

### Problem Statement

There was an exam consisting of three problems worth 1, 2, and 4 points.

Takahashi, Aoki, and Snuke took this exam. Takahashi scored A points, and Aoki scored B points.

Snuke solved all of the problems solved by at least one of Takahashi and Aoki, and failed to solve any of the problems solved by neither of them.

Find Snuke's score.

It can be proved that Snuke's score is uniquely determined under the Constraints of this problem.

### Constraints

• 0\leq A,B \leq 7
• A and B are integers.

### Input

The input is given from Standard Input in the following format:

A B


### Output

Print Snuke's score as an integer.

### Sample Input 1

1 2


### Sample Output 1

3


Since Takahashi scored 1 point, we see that he solved only the 1-point problem and failed to solve the other two.
Similarly, since Aoki scored 2 points, we see that he solved only the 2-point problem and failed to solve the other two.

Therefore, Snuke must have solved the 1- and 2-point problems, but not the 4-point one, which Takahashi and Aoki both failed to solve, for a score of 3 points. Thus, 3 should be printed.

### Sample Input 2

5 3


### Sample Output 2

7


Since Takahashi scored 5 points, we see that he solved the 1- and 4-point problems but not the 2-point one.
Similarly, since Aoki scored 3 points, we see that he solved the 1- and 2-point problems but not the 4-point one.

Therefore, each of the three problems is solved by at least one of Takahashi and Aoki, so we see that Snuke solved all of the problems, for a score of 7 points. Thus, 7 should be printed.

### Sample Input 3

0 0


### Sample Output 3

0


Both Takahashi and Aoki solved none of the problems. Therefore, so did Snuke. Thus, 0 should be printed.