diff --git a/native_client/trie_load.cc b/native_client/trie_load.cc
index eab97b4b..cd625c23 100644
--- a/native_client/trie_load.cc
+++ b/native_client/trie_load.cc
@@ -5,8 +5,13 @@
 #include "ctcdecode/scorer.h"
 #include "alphabet.h"
 
-using namespace std;
+#ifdef DEBUG
+#include <limits>
+#include <unordered_map>
+#include "ctcdecode/path_trie.h"
+#endif // DEBUG
 
+using namespace std;
 
 int main(int argc, char** argv)
 {
@@ -22,5 +27,40 @@ int main(int argc, char** argv)
     return err;
   }
   Scorer scorer;
+
+#ifndef DEBUG
   return scorer.init(0.0, 0.0, kenlm_path, trie_path, alphabet);
+#else
+  // Print some info about the FST
+  using FstType = fst::ConstFst<fst::StdArc>;
+
+  auto dict = scorer.dictionary.get();
+
+  struct state_info {
+    int range_min = std::numeric_limits<int>::max();
+    int range_max = std::numeric_limits<int>::min();
+  };
+
+  auto print_states_from = [&](int i) {
+    std::unordered_map<int, state_info> sinfo;
+    for (fst::ArcIterator<FstType> aiter(*dict, i); !aiter.Done(); aiter.Next()) {
+      const fst::StdArc& arc = aiter.Value();
+      sinfo[arc.nextstate].range_min = std::min(sinfo[arc.nextstate].range_min, arc.ilabel-1);
+      sinfo[arc.nextstate].range_max = std::max(sinfo[arc.nextstate].range_max, arc.ilabel-1);
+    }
+
+    for (auto it = sinfo.begin(); it != sinfo.end(); ++it) {
+      state_info s = it->second;
+      printf("%d -> state %d (chars 0x%X - 0x%X, '%c' - '%c')\n", i, it->first, (unsigned int)s.range_min, (unsigned int)s.range_max, (char)s.range_min, (char)s.range_max);
+    }
+  };
+
+  print_states_from(0);
+
+  // for (int i = 1; i < 10; ++i) {
+  //   print_states_from(i);
+  // }
+#endif // DEBUG
+
+  return 0;
 }