diff --git a/boilerplate.c b/boilerplate.c
new file mode 100644
index 0000000..2848a59
--- /dev/null
+++ b/boilerplate.c
@@ -0,0 +1,19 @@
+#include <stdio.h>
+#include "boilerplate.h"
+
+int compare(const void * a, const void * b) {
+    return ((signature *)a)->sign - ((signature *)b)->sign;
+}
+
+uint32_t getsig(char * word) {
+    uint32_t result = 0;
+    for (uint32_t i = 0; i < 5; i++) {
+        uint32_t bit = 1u << (word[i] & CHARMASK);
+        if (result & bit) {
+            // duplicate letters
+            return 0;
+        }
+        result |= bit;
+    }
+    return result;
+}
\ No newline at end of file
diff --git a/boilerplate.h b/boilerplate.h
new file mode 100644
index 0000000..f50033f
--- /dev/null
+++ b/boilerplate.h
@@ -0,0 +1,68 @@
+#include <stdint.h>
+
+#if TIME_SECTIONS
+    #include <time.h>
+
+    clock_t start, end;
+    double section_time;
+    char * curr_section;
+
+    #define START_TIME(section_name) do {\
+        curr_section = section_name;\
+        fprintf(stderr, "BEGIN %s\n", curr_section);\
+        start = clock();\
+    } while (0);
+
+    #define END_TIME do {\
+        end = clock();\
+        section_time = ((double) (end - start)) / CLOCKS_PER_SEC;\
+        fprintf(stderr, "END %s, %fs\n\n", curr_section, section_time);\
+    } while (0);
+
+#else
+    // TIME_SECTIONS not specified, define to be nothing
+    #define START_TIME(section_name) 0;
+    #define END_TIME 0;
+
+#endif
+
+/* <defines> */
+    #define WORDS 12971
+    #define WORDLEN 5
+    #define CHARMASK ~0b1100000u
+
+    #define A_BIT 0b10
+    #define B_BIT 0b100
+    #define C_BIT 0b1000
+    #define D_BIT 0b10000
+
+
+    #if PRINT_INTERMEDIATES
+        #define PRINT2\
+        printf("%s, %s\n", sigs[i1].word, sigs[i2].word);
+
+        #define PRINT3\
+        printf("%s, %s, %s\n", sigs[i1].word, sigs[i2].word, sigs[i3].word);
+
+        #define PRINT4\
+        printf("%s, %s, %s, %s\n", sigs[i1].word, sigs[i2].word, sigs[i3].word, sigs[i4].word);
+    #else
+        #define PRINT2 0;
+        #define PRINT3 0;
+        #define PRINT4 0;
+    #endif
+/* </defines> */
+
+typedef struct signature {
+    char * word;
+    uint32_t sign;
+} signature;
+
+/* <declarations> */
+    int compare(const void*, const void*);
+
+    uint32_t getsig(char*);
+
+    void findWords(signature*, uint32_t);
+    signature* rmdups(signature*);
+/* </declarations> */