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| 0001628280-19-005714.txt | 2019-05-02 18:16:32 | |
 0001628280-19-005714-xbrl.zip | 130097 | 2019-05-02 18:16:32 |
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| report.css | 2767 | 2019-05-02 18:16:32 |
| sfe-20190331.xml | 667601 | 2019-05-02 18:16:32 |
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| sfe-2019xq1xex321.htm | 8923 | 2019-05-02 18:16:32 |
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| Show.js | 1085 | 2019-05-02 18:16:32 |