In the 1980s, a German spy was assigned a mission to retrieve a set of important documents kept inside a British outpost. The spy knew that the documents were locked in a safe, which the password was a three-integer-sequence. He had to make sure the password was correct, as the safe was connected to an alarm that would be triggered whenever any unauthorized access was detected.

The German intelligence agency acquired several number sequences from a British traitor. The traitor insisted that these sequences contained vital information about the password. However, he could not figure out what the actual password was; he just knew that `A`, `B`, `C` were the three integers needed to be keyed in, and they were somehow related to a kind of sports.

The number sequences were:

**Seq.1** - 14, 32, 16, `A`, 28, 18, 24  

**Seq.2** - 19, 3, `B`, 2, 15, 10, 6  

**Seq.3** - 3, 54, `C`, 39, 18, 30, 45 

Do you know what `A`, `B`, `C` are?

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*Hint*

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>  The numbers in **Seq.2** can be seen in that sport **directly**, while those in the other two sequences are not that obvious.
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**Visual Explanation to the answer**

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>  [![Sequences on a dartboard](https://i.stack.imgur.com/20o6d.png)](https://i.stack.imgur.com/20o6d.png)  
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> **Seq.1** - Blue, clockwise. They are the **doubles**.  
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> **Seq.2** - Orange, counter-clockwise. They are the **singles**.  
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> **Seq.3** - Purple, clockwise. They are the **trebles** or **triples**.
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