diff --git a/.gitignore b/.gitignore
index ed956bc..0bb5148 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,6 @@
 __pycache__
 .#*
+/build/*
+*.html
+*.pyd
+/fits.c
diff --git a/setup.py b/setup.py
new file mode 100644
index 0000000..27126cb
--- /dev/null
+++ b/setup.py
@@ -0,0 +1,17 @@
+from setuptools import setup, find_packages
+from Cython.Build import cythonize
+
+with open("requirements.txt") as file:
+    REQUIREMENTS = file.read().rstrip().split("\n")
+
+setup(
+    author="Raphael Roberts",
+    author_email="raphael.robets48@gmail.com",
+    description="Cheat for wordscape and wordscape like games",
+    entry_points=None,
+    ext_modules=cythonize("src/fits.pyx"),
+    install_requires=REQUIREMENTS,
+    name="wordscape_cheats",
+    packages=find_packages(),
+    version="1.0",
+)
diff --git a/src/c_fits.c b/src/c_fits.c
new file mode 100644
index 0000000..05fb39e
--- /dev/null
+++ b/src/c_fits.c
@@ -0,0 +1,30 @@
+int _fits(char* bottom, int len_bottom, char* top, int len_top) {
+    int bottom_letters[26];
+    int top_letters[26];
+    int letter_val;
+    int i;
+    for (i = 0; i < len_bottom; i++) {
+        letter_val = bottom[i]-96;
+        if (0 <= letter_val && letter_val <= 25) {
+            bottom_letters[letter_val] += 1;
+        }
+	else {
+	    return 1;
+	}
+    }
+    for (i = 0; i < len_top; i++) {
+        letter_val = top[i]-96;
+        if (0 <= letter_val && letter_val <= 25) {
+            top_letters[letter_val] += 1;
+        }
+	else {
+	    return 1;
+	}
+    }
+    for (i = 0; i < 26; i++ ) {
+        if (bottom_letters[i] < top_letters) {
+            return 0;
+        }
+    }
+    return 1;
+}
diff --git a/src/fits.pyx b/src/fits.pyx
new file mode 100644
index 0000000..58d415e
--- /dev/null
+++ b/src/fits.pyx
@@ -0,0 +1,6 @@
+cdef extern from "c_fits.c":
+    int _fits(char* bottom, int len_bottom, char* top, int len_top)
+
+
+cpdef bint fits(str bottom, str top):
+    return _fits(bottom.encode(), len(bottom), top.encode(), len(top)) == 0
diff --git a/candidate_cache.py b/wordscape/candidate_cache.py
similarity index 65%
rename from candidate_cache.py
rename to wordscape/candidate_cache.py
index 51e7442..50508e9 100644
--- a/candidate_cache.py
+++ b/wordscape/candidate_cache.py
@@ -1,25 +1,23 @@
 from collections import Counter
-from dictionary import Dictionary, DICTS
+
+from wordscape.dictionary import Dictionary, DICTS
+from wordscape.fits import fits
 
 
 def make_key(dictionary_name, letters):
     return (dictionary_name, frozenset(Counter(letters).items()))
 
 
-def candidates(letters, dictionary: Dictionary, min=2, permutations=None):
-    letter_counter = Counter(letters)
+def candidates(letters, dictionary: Dictionary):
+    letters = "".join(letters)
     possibilities = []
     for word in dictionary.word_frequency.keys():
-        word_counter = Counter(word)
         try:
-            add = all(
-                word_counter[key] <= letter_counter[key] for key in word_counter.keys()
-            )
-        except KeyError:
-            add = False
-        if add:
-            possibilities.append(word)
-    return possibilities
+            if fits(letters, word):
+                possibilities.append(word)
+        except ZeroDivisionError:
+            breakpoint()
+    return word
 
 
 class CandidateCache:
diff --git a/dictionary.py b/wordscape/dictionary.py
similarity index 100%
rename from dictionary.py
rename to wordscape/dictionary.py
diff --git a/main.py b/wordscape/main.py
old mode 100755
new mode 100644
similarity index 95%
rename from main.py
rename to wordscape/main.py
index 517ed74..eab5a3c
--- a/main.py
+++ b/wordscape/main.py
@@ -6,9 +6,9 @@ import re
 
 import cmd2
 
-from candidate_cache import CandidateCache
-from dictionary import DICTS
-from word_remove_dialog import RemoveWordsActivity
+from wordscape.candidate_cache import CandidateCache
+from wordscape.dictionary import DICTS
+from wordscape.word_remove_dialog import RemoveWordsActivity
 
 
 LOWERCASE = set(ascii_lowercase)
@@ -137,5 +137,5 @@ class MainLoop(cmd2.Cmd):
             return
 
 
-if __name__ == "__main__":
+def main():
     MainLoop().cmdloop()
diff --git a/word_remove_dialog.py b/wordscape/word_remove_dialog.py
similarity index 100%
rename from word_remove_dialog.py
rename to wordscape/word_remove_dialog.py