diff --git a/codebleu/syntax_match.py b/codebleu/syntax_match.py
index 92dd6db..802e495 100644
--- a/codebleu/syntax_match.py
+++ b/codebleu/syntax_match.py
@@ -71,6 +71,13 @@ def get_all_sub_trees(root_node):
             cand_sexps = [x[0] for x in get_all_sub_trees(candidate_tree)]
             ref_sexps = [x[0] for x in get_all_sub_trees(reference_tree)]
 
+            print('cand_sexps')
+            for tree, depth in get_all_sub_trees(candidate_tree):
+                print('  ', depth, tree)
+            print('ref_sexps')
+            for tree, depth in get_all_sub_trees(reference_tree):
+                print('  ', depth, tree)
+
             # TODO: fix, now we count number of reference subtrees matching candidate,
             #       but we should count number of candidate subtrees matching reference
             #       See (4) in "3.2 Syntactic AST Match" of https://arxiv.org/pdf/2009.10297.pdf
@@ -83,6 +90,7 @@ def get_all_sub_trees(root_node):
                     match_count_candidate_to_reference += 1
 
             total_count += len(ref_sexps)
-
+    print(f'match_count       {match_count} / {total_count}')
+    print(f'match_count_fixed {match_count_candidate_to_reference} / {total_count}')
     score = match_count / total_count
     return score