introduce bitloops

src/main/java/puzzle/CsvIndexService.java

@@ -68,6 +68,7 @@ public final class CsvIndexService
             return lineToSimpel(SC.get().getLine(index));
          return -1;
       } catch (Exception e) {
+         e.printStackTrace();
          throw new RuntimeException("Failed to get clues for index " + index, e);
       }
    }
@@ -77,6 +78,7 @@ public final class CsvIndexService
             return lineToClue(SC.get().getLine(index));
          return new String[0];
       } catch (Exception e) {
+         e.printStackTrace();
          throw new RuntimeException("Failed to get clues for index " + index, e);
       }
    }