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```
#!/usr/bin/perl
...
}
```

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C:\>perl fet 989 9400 43300 2400
Ratio = 0.08070604647867725e-7028
...
C:\>perl buk 1e6 2e6 2e6 1e6
2.73353759185676100e-147576
1 trial of [1e6 2e6 2e6 1e6] (70.739s total)