introduce bitloops

src/main/java/puzzle/Main.java

@@ -3,6 +3,7 @@ package puzzle;
 import lombok.AllArgsConstructor;
 import lombok.Data;
 import lombok.NoArgsConstructor;
+import lombok.val;
 import puzzle.SwedishGenerator.Rng;
 
 import java.io.IOException;
@@ -60,7 +61,14 @@ public class Main {
    public void main(String[] args) {
       var csv = Paths.get("nl_score_hints_v3.csv");
       var idx = Paths.get("nl_score_hints_v3.idx");
-      ScopedValue.where(SC, new CsvIndexService(csv, idx)).run(() -> _main(args));
+      try {
+         val scv = new CsvIndexService(csv, idx);
+         scv.ensureLoaded();
+         ScopedValue.where(SC, scv).run(() -> _main(args));
+      } catch (IOException e) {
+         throw new RuntimeException(e);
+      }
+      
    }
    public void _main(String[] args) {
       var opts = parseArgs(args);