diff --git a/a.out b/a.out
new file mode 100755
index 0000000..207aa1f
Binary files /dev/null and b/a.out differ
diff --git a/src/main.cc b/src/main.cc
index febd5e0..21209c3 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -6,7 +6,7 @@
 #include <cctype>
 #include <xcdat.hpp>
 
-// as this is in test phase, i recommend testing with the input being "特別協力組合理事"
+
 
 struct Entry {
     std::string_view decoded_view;
diff --git a/src/main.cc~ b/src/main.cc~
new file mode 100644
index 0000000..febd5e0
--- /dev/null
+++ b/src/main.cc~
@@ -0,0 +1,109 @@
+#include <iostream>
+#include <vector>
+#include <algorithm>
+#include <limits>
+#include <cstring>
+#include <cctype>
+#include <xcdat.hpp>
+
+// as this is in test phase, i recommend testing with the input being "特別協力組合理事"
+
+struct Entry {
+    std::string_view decoded_view;
+    uint64_t id;
+    Entry(std::string_view decoded_view, uint64_t id) : decoded_view(decoded_view), id(id) {}
+};
+
+int main(int argc, char* argv[]) {
+    if (argc < 2) {
+        std::cerr << "Usage: " << argv[0] << " <search_string> [--debug] [--dict <path_to_dictionary>]" << std::endl;
+        return 1;
+    }
+
+    std::string search_string;
+    bool debug_mode = false;
+    std::string dict_file = "dict.bin"; // Default dictionary file path
+
+    // Parse command line arguments
+    for (int i = 1; i < argc; ++i) {
+        if (std::strcmp(argv[i], "--debug") == 0) {
+            debug_mode = true;
+        } else if (std::strcmp(argv[i], "--dict") == 0 && i + 1 < argc) {
+            dict_file = argv[i + 1];
+            i++; // Skip the next argument as it's the dictionary file path
+        } else {
+            search_string = argv[i];
+        }
+    }
+
+    if (search_string.empty()) {
+        std::cerr << "Search string not provided." << std::endl;
+        return 1;
+    }
+
+    std::string raw_output;
+    const auto trie = xcdat::load<xcdat::trie_15_type>(dict_file);
+
+    std::vector<std::string> substrings;
+    std::vector<Entry> results;
+    while (!search_string.empty()) {
+        auto itr = trie.make_prefix_iterator(search_string);
+
+        while (itr.next()) {
+            results.emplace_back(itr.decoded_view(), itr.id());
+        }
+
+        size_t min_length = std::numeric_limits<size_t>::max();
+        std::string_view smallest_prefix;
+
+        for (const auto& entry : results) {
+            if (entry.decoded_view.size() < min_length) {
+                min_length = entry.decoded_view.size();
+                smallest_prefix = entry.decoded_view;
+            }
+        }
+
+        if (min_length > 0) {
+            std::string substring = search_string.substr(0, search_string.find(smallest_prefix));
+            if (!substring.empty()) {
+                substrings.push_back(substring);
+            }
+            std::cout << search_string << " - " << smallest_prefix << " = ";
+
+            if (debug_mode) {
+                raw_output += search_string + " - " + std::string(smallest_prefix) + " = ";
+            }
+
+            size_t pos = search_string.find(smallest_prefix);
+            if (pos != std::string::npos) {
+                search_string.erase(0, pos + smallest_prefix.length());
+            }
+	    else break;
+
+            std::cout << search_string << std::endl;
+
+	    if (smallest_prefix.length() == 0)
+	      break;
+
+            if (debug_mode) {
+                raw_output += search_string + '\n';
+            }
+
+            while (!search_string.empty() && std::isspace(search_string.front())) {
+                search_string.erase(0, 1);
+            }
+        } else {
+            break;
+        }
+    }
+
+    if (debug_mode) {
+        std::cout << "Stored raw output:" << std::endl << raw_output << std::endl;
+    }
+
+    for (const auto& sub : substrings) {
+        std::cout << sub << std::endl;
+    }
+
+    return 0;
+}