diff --git a/c-gaps/credit.c b/c-gaps/credit.c
index 2a60e39..1718016 100644
--- a/c-gaps/credit.c
+++ b/c-gaps/credit.c
@@ -1,9 +1,127 @@
 #include <lua.h>
+#include <stdlib.h>
 #include <lauxlib.h>
 
-// implement it here
+int TTT(lua_State* L) {
+	luaL_argcheck(L, lua_type(L, 1) == LUA_TTABLE , 1, "Must table");
+	int i = 0, j = 0;
+	size_t len1, len2, len3;
 
-int luaopen_gaps(lua_State* L) {
-    // return it here
-    return 0;
+	lua_rawgeti(L, 1, 1);
+	lua_rawgeti(L, 1, 2);
+	lua_rawgeti(L, 1, 3);
+
+	if ((lua_type(L, 3) == LUA_TNIL)&& (lua_type(L, 4) == LUA_TNIL)&& (lua_type(L, 2) !=  LUA_TNIL)) {
+		luaL_argcheck(L, lua_type(L, 2) == LUA_TSTRING , 2, "Must string");
+		const char* str1 = luaL_checklstring(L, 2, &len1);
+		char* charD1 = malloc(len1);
+		for (i = 0; i < len1; i++) {
+			if ((str1[i] == '-')) {
+			
+		} else {
+			charD1[j] = str1[i];
+			j = j + 1;
+		}
+		}
+		for (i = j; i < len1; i++) {
+				charD1[i] = ' ';
+			}		
+		lua_newtable(L);
+		lua_pushlstring(L, charD1, j);
+		lua_rawseti(L, 5, 1);
+		free(charD1);
+
+		
+		
+		} else if ((lua_type(L, 3) == LUA_TNIL)&& (lua_type(L, 4) == LUA_TNIL)&& (lua_type(L, 2) == LUA_TNIL)){
+				lua_newtable(L);
+			
+
+		
+		}  else if ((lua_type(L, 4) == LUA_TNIL)&& (lua_type(L, 2) != LUA_TNIL)&&(lua_type(L, 3) != LUA_TNIL)) {
+		luaL_argcheck(L, lua_type(L, 2) == LUA_TSTRING , 2, "Must string");
+		const char* str1 = luaL_checklstring(L, 2, &len1);		
+		
+		luaL_argcheck(L, lua_type(L, 2) == LUA_TSTRING , 3, "Must string");
+		const char* str2 = luaL_checklstring(L, 3, &len2);
+		luaL_argcheck(L, len1 == len2, 1, "Strings must be equal");
+		char* charD1 = malloc(len1);
+		char* charD2 = malloc(len1);
+		
+		
+		for (i = 0; i < len1; i++) {
+			if ((str1[i] == '-') && (str2[i] == '-')) {
+			
+		} else {
+			charD1[j] = str1[i];
+			charD2[j] = str2[i];
+			j = j + 1;
+		}
+		}
+		for (i = j; i < len1; i++) {
+				charD1[i] = ' ';
+				charD2[i] = ' ';
+
+		}
+		lua_newtable(L);
+		lua_pushlstring(L, charD1, j);
+		lua_rawseti(L, 5, 1);
+		lua_pushlstring(L, charD2, j);
+		lua_rawseti(L, 5, 2);
+		
+		free(charD1);
+		free(charD2);
+		
+		
+		
+		} else {
+		luaL_argcheck(L, lua_type(L, 2) == LUA_TSTRING , 2, "Must string");
+		const char* str1 = luaL_checklstring(L, 2, &len1);	
+		
+		
+		luaL_argcheck(L, lua_type(L, 3) == LUA_TSTRING , 3, "Must string");
+		const char* str2 = luaL_checklstring(L, 3, &len2);
+		luaL_argcheck(L, lua_type(L, 4) == LUA_TSTRING , 4, "Must string");		
+		const char* str3 = luaL_checklstring(L, 4, &len3);
+		luaL_argcheck(L, len1 == len2, 1, "Strings must be equal");
+		luaL_argcheck(L, len2 == len3, 1, "Strings must be equal");
+		char* charD1 = malloc(len1);
+		char* charD2 = malloc(len1);
+		char* charD3 = malloc(len1);
+			for (i = 0; i < len1; i++) {
+				if ((str1[i] == '-') && (str2[i] == '-') && (str3[i] == '-')) {
+			
+					} else {
+						charD1[j] = str1[i];
+						charD2[j] = str2[i];
+						charD3[j] = str3[i];
+						j = j + 1;
+					}
+			}
+			for (i = j; i < len1; i++) {
+				charD1[i] = ' ';
+				charD2[i] = ' ';
+				charD3[i] = ' ';
+				}
+		lua_newtable(L);
+		lua_pushlstring(L, charD1, j);
+		lua_rawseti(L, 5, 1);
+		lua_pushlstring(L, charD2, j);
+		lua_rawseti(L, 5, 2);
+		lua_pushlstring(L, charD3, j);
+		lua_rawseti(L, 5, 3);
+
+
+		free(charD1);
+		free(charD2);
+		free(charD3);
+
+		}
+	
+	return 1;
+}
+
+int luaopen_gaps(lua_State* L){
+	lua_pushcfunction(L, &TTT);
+	return 1;
 }
diff --git a/c-gaps/spec.lua b/c-gaps/spec.lua
index 2129000..498c005 100644
--- a/c-gaps/spec.lua
+++ b/c-gaps/spec.lua
@@ -1,9 +1,9 @@
 describe("gaps (implementation)", function()
-    pending("loads module", function()
+    it("loads module", function()
         local f = require 'gaps'
     end)
 
-    pending("doesn't change good alignment", function()
+    it("doesn't change good alignment", function()
         local f = require 'gaps'
         assert.same({}, f({}))
         assert.same({''}, f({''}))
@@ -14,7 +14,7 @@ describe("gaps (implementation)", function()
         assert.same({'A'}, f({'A-'}))
     end)
 
-    pending("removes gap columns", function()
+    it("removes gap columns", function()
         local f = require 'gaps'
         assert.same({''}, f({'-'}))
         assert.same({'', ''}, f({'-', '-'}))
@@ -30,7 +30,7 @@ describe("gaps (implementation)", function()
         }))
     end)
 
-    pending("throws error if input is not table",
+    it("throws error if input is not table",
     function()
         local f = require 'gaps'
         assert.has_error(function()
@@ -41,7 +41,7 @@ describe("gaps (implementation)", function()
         end)
     end)
 
-    pending("throws error if table members are not strings",
+    it("throws error if table members are not strings",
     function()
         local f = require 'gaps'
         assert.has_error(function()
@@ -49,7 +49,7 @@ describe("gaps (implementation)", function()
         end)
     end)
 
-    pending("throws error if strings' lengths differ",
+    it("throws error if strings' lengths differ",
     function()
         local f = require 'gaps'
         assert.has_error(function()