diff --git a/src/Colleen.c b/src/Colleen.c
index 1bfb734..f35a527 100644
--- a/src/Colleen.c
+++ b/src/Colleen.c
@@ -1,6 +1,40 @@
+#include <stddef.h>
+#include <unistd.h>
+
+void
+foo(void)
+{
+	write(2, "Hello world!\n", 13);
+}
 
 int
 main(void)
 {
+	// One of the comments must be present in the main function
+	char	*src = "#include <stddef.h>\n#include <unistd.h>\n\nvoid\nfoo(void)\n{\n\twrite(2, \"Hello world!\\n\", 13);\n}\n\nint\nmain(void)\n{\n\t// One of the comments must be present in the main function\n\tchar\t*src = \"$\";\n\tfor (size_t i = 0; src[i]; ++i)\n\t{\n\t\tif (36 == src[i])\n\t\t{\n\t\t\tfor (size_t j = 0; src[j]; ++j)\n\t\t\t{\n\t\t\t\tswitch (src[j])\n\t\t\t\t{\n\t\t\t\t\tcase 10:\twrite(1, \"\\\\n\", 2); break;\n\t\t\t\t\tcase 9:\t\twrite(1, \"\\\\t\", 2); break;\n\t\t\t\t\tcase '\\\\':\twrite(1, \"\\\\\\\\\", 2); break;\n\t\t\t\t\tcase '\"':\twrite(1, \"\\\\\\\"\", 2); break;\n\t\t\t\t\tdefault:\twrite(1, &src[j], 1);\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\telse\n\t\t{\n\t\t\twrite(1, &src[i], 1);\n\t\t}\n\t}\n\n\tfoo();\n\treturn 0;\n}\n// One of the comments must be present outside of your program.\n";
+	for (size_t i = 0; src[i]; ++i)
+	{
+		if (36 == src[i])
+		{
+			for (size_t j = 0; src[j]; ++j)
+			{
+				switch (src[j])
+				{
+					case 10:	write(1, "\\n", 2); break;
+					case 9:		write(1, "\\t", 2); break;
+					case '\\':	write(1, "\\\\", 2); break;
+					case '"':	write(1, "\\\"", 2); break;
+					default:	write(1, &src[j], 1);
+				}
+			}
+		}
+		else
+		{
+			write(1, &src[i], 1);
+		}
+	}
+
+	foo();
 	return 0;
 }
+// One of the comments must be present outside of your program.