diff --git a/src/klotski_core/ffi/tmain.cc b/src/klotski_core/ffi/tmain.cc
index 63a4fa5..499569e 100644
--- a/src/klotski_core/ffi/tmain.cc
+++ b/src/klotski_core/ffi/tmain.cc
@@ -4,6 +4,7 @@
 
 #include <set>
 #include <unordered_set>
+#include <unordered_map>
 
 #include "klotski.h"
 #include "core.h"
@@ -20,23 +21,80 @@ using klotski::Group;
 using klotski::AllCases;
 
 using klotski::RawCode;
+using klotski::ShortCode;
 using klotski::CommonCode;
 
 using klotski::Benchmark;
 using klotski::BasicRanges;
 
+
 void tmain() {
 //    printf("tmain start\n");
 
-//    auto ret = Group::build_groups(0);
-//    std::cout << ret[0].size() << std::endl;
+//    auto c = CommonCode(0x1A9BF0C00);
+
+//    auto groups = Group::build_groups(Group::type_id(c));
+//    for (uint32_t i = 0; i < groups.size(); ++i) {
+//        std::cout << g.size() << std::endl;
+//        if (std::find(groups[i].begin(), groups[i].end(), c) != groups[i].end()) {
+//            std::cout << i << " -> " << groups[i].size() << std::endl;
+//        } else {
+//            std::cout << "not found" << std::endl;
+//        }
+//
+//    }
+
+    struct group_info_t {
+        uint16_t type_id;
+        uint16_t group_id;
+        uint32_t group_index;
+    };
+
+//    std::unordered_map<CommonCode, group_info_t> data;
+
+    std::vector<group_info_t> data;
+
+    data.resize(klotski::SHORT_CODE_LIMIT);
+
+    ShortCode::speed_up(ShortCode::FAST);
+
+//    uint16_t type_id = 123;
+
+    for (uint16_t type_id = 0; type_id < klotski::TYPE_ID_LIMIT; ++type_id) {
+        auto groups = Group::build_groups(type_id);
+        for (uint32_t id = 0; id < groups.size(); ++id) {
 
-//    auto g = Group::build_groups(123);
-//    std::cout << g.size() << std::endl;
+            std::sort(groups[id].begin(), groups[id].end());
 
-    for (uint32_t type_id = 0; type_id < 204; ++type_id) {
-        std::cout << Group::build_groups(type_id).size() << std::endl;
+            for (uint32_t index = 0; index < groups[id].size(); ++index) {
+                data[groups[id][index].to_short_code().unwrap()] = {
+                    .type_id = type_id,
+                    .group_id = static_cast<uint16_t>(id),
+                    .group_index = index,
+                };
+            }
+        }
+//        std::cout << type_id << std::endl;
+        std::cerr << type_id << std::endl;
     }
 
+//    std::cout << data.size() << std::endl;
+
+    for (auto &&tmp : data) {
+        std::cout << tmp.group_index << std::endl;
+    }
+
+
+//    for (auto &&g : Group::build_groups(123)) {
+
+//        std::cout << *std::min_element(g.begin(), g.end()) << std::endl;
+
+//        std::cout << g.size() << std::endl;
+//    }
+
+//    for (uint32_t type_id = 0; type_id < 204; ++type_id) {
+//        std::cout << Group::build_groups(type_id).size() << std::endl;
+//    }
+
 //    printf("tmain exit\n");
 }
diff --git a/src/klotski_core/group/group.cc b/src/klotski_core/group/group.cc
index b72c504..b6178fb 100644
--- a/src/klotski_core/group/group.cc
+++ b/src/klotski_core/group/group.cc
@@ -107,7 +107,7 @@ std::vector<std::vector<CommonCode>> Group::build_groups(uint32_t type_id) {
     }
 
     auto compare_func = [](const std::vector<CommonCode> &v1, const std::vector<CommonCode> &v2) {
-        return v1.size() < v2.size(); // sort by vector size
+        return v1.size() > v2.size(); // sort by vector size
     };
     std::stable_sort(groups.begin(), groups.end(), compare_func); // using stable sort for ordered index
     return groups;