some test cases, already mentioned in comments, .ods
97831-IFS-SWITCH.ods (application/x-vnd.oasis.opendocument.spreadsheet), 15.05 KB, created by Eike Rathke on 2016-05-27 17:55:35 UTC
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Creator: Eike Rathke
Created: 2016-05-27 17:55:35 UTC
Size: 15.05 KB

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