diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 5090117..b58b646 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -13,6 +13,7 @@ add_executable(${PROJECT_NAME}
 	get_env.cpp
 	envy.cpp
 	cgi_env.cpp
+	num_to_token.cpp
 )
 
 target_include_directories(${PROJECT_NAME} SYSTEM
diff --git a/src/num_to_token.cpp b/src/num_to_token.cpp
new file mode 100644
index 0000000..0fe2dd5
--- /dev/null
+++ b/src/num_to_token.cpp
@@ -0,0 +1,47 @@
+#include "num_to_token.hpp"
+#include <cassert>
+
+namespace tawashi {
+	namespace {
+		//const int g_any_min = 0;
+		//const int g_any_max = g_any_min + 'z' - 'a' - 1;
+		//const int g_vowel_min = g_any_max + 1;
+		//const int g_vowel_max = g_vowel_min + 5 - 1;
+		//const int g_consonant_min = g_vowel_max + 1;
+		//const int g_consonant_max = g_consonant_min + ('z' - 'a') - (g_vowel_max - g_vowel_min) - 1;
+
+		//char code_to_char (int parCode) {
+		//	const char vowels[] = {'a', 'i', 'u', 'e', 'o'};
+		//	const char consonants[] = {
+		//		'b', 'c', 'd', 'f', 'g', 'h', 'j', 'k', 'l', 'm', 'n', 'p',
+		//		'q', 'r', 's', 't', 'v', 'w', 'x', 'y', 'z'
+		//	};
+
+		//	static_assert(sizeof(vowels) == g_vowel_max - g_vowel_min + 1, "Wrong vowels count");
+		//	static_assert(sizeof(consonants) == g_consonant_max - g_consonant_min + 1, "Wrong consonants count");
+
+		//	if (parCode <= g_any_max)
+		//		return static_cast<char>('a' + parCode - g_any_min);
+		//	else if (parCode <= g_vowel_max)
+		//		return vowels[parCode - g_vowel_min];
+		//	else if (parCode <= g_consonant_max)
+		//		return consonants[parCode - g_consonant_min];
+
+		//	assert(false);
+		//	return 'X';
+		//}
+	} //unnamed namespace
+
+	std::string make_token (uint64_t parNum) {
+		assert(0 != parNum);
+		std::string retval;
+
+		do {
+			const auto remainder = parNum % ('z' - 'a' + 1);
+			retval.push_back(static_cast<char>(remainder));
+			parNum /= ('z' - 'a' + 1);
+		} while (parNum);
+
+		return retval;
+	}
+} //namespace tawashi
diff --git a/src/num_to_token.hpp b/src/num_to_token.hpp
new file mode 100644
index 0000000..aaa6d8f
--- /dev/null
+++ b/src/num_to_token.hpp
@@ -0,0 +1,9 @@
+#pragma once
+
+#include "duckhandy/compatibility.h"
+#include <string>
+#include <cstdint>
+
+namespace tawashi {
+	std::string make_token (uint64_t parNum) a_pure;
+} //namespace tawashi