diff --git a/python/plugin/banana.py b/python/plugin/banana.py
index edb0917..639905c 100644
--- a/python/plugin/banana.py
+++ b/python/plugin/banana.py
@@ -2,22 +2,17 @@
 
 import vim
 import re
-import sys
-
-def dec2banana(num, dictstart = None, shiftend = None, minlength = None, dictionary = None):
-    #defaults
-    if dictstart is None: dictstart = 0
-    if shiftend is None: shiftend = 0
-    if minlength is None: minlength = 0
-    if dictionary is None: dictionary = [list("bcdfglmnprstvz"), list("aeiou")]
-    
+
+def dec2banana(num):
+    dictionary = [list("bcdfglmnprstvz"), list("aeiou")]
     numdict = len(dictionary)
+
     v = num
     st = ""
     l = 0
 
-    i = (numdict - 1 + dictstart + shiftend) % numdict
-    while not (v == 0 and i == (numdict - 1 + dictstart) % numdict and l >= minlength):
+    i = (numdict - 1) % numdict
+    while not (v == 0 and i == (numdict - 1) % numdict and l >= 0):
         r = v % len(dictionary[i])
         v = int(v / len(dictionary[i]))
         st = dictionary[i][r] + st
@@ -27,18 +22,15 @@ def dec2banana(num, dictstart = None, shiftend = None, minlength = None, diction
     return(st)
 
     
-def banana2dec(banana, dictstart = None, shiftend = None, dictionary = None):
-    #defaults
-    if dictstart is None: dictstart = 0
-    if shiftend is None: shiftend = 0
-    if dictionary is None: dictionary = [list("bcdfglmnprstvz"), list("aeiou")] #, list("123456")
+def banana2dec(banana):
+    dictionary = [list("bcdfglmnprstvz"), list("aeiou")]
 
     numdict = len(dictionary)
-    if (len(banana) - shiftend) % numdict != 0:
+    if len(banana) % numdict != 0:
         return("Banana non valida")
     v = 0
     for i in range(len(banana)):
-        r = (numdict + i + dictstart) % numdict
+        r = (numdict + i) % numdict
         try:
             v = v * len(dictionary[r]) + dictionary[r].index(banana[i])
         except:
@@ -46,17 +38,14 @@ def banana2dec(banana, dictstart = None, shiftend = None, dictionary = None):
     
     return(v)
 
-def isbanana(banana, dictstart = None, shiftend = None, dictionary = None):
-    #defaults
-    if dictstart is None: dictstart = 0
-    if shiftend is None: shiftend = 0
-    if dictionary is None: dictionary = [list("bcdfglmnprstvz"), list("aeiou")] #, list("123456")
-
+def isbanana(banana):
+    dictionary = [list("bcdfglmnprstvz"), list("aeiou")] #, list("123456")
     numdict = len(dictionary)
-    if (len(banana) - shiftend) % numdict != 0:
+
+    if len(banana) % numdict != 0:
         return(False)
     for i in range(len(banana)):
-        r = (numdict + i + dictstart) % numdict
+        r = (numdict + i) % numdict
         if banana[i] not in dictionary[r]:
             return(False)
 
@@ -66,8 +55,7 @@ def callback(x):
     return "%s" % dec2banana(int(x[0], base=10)).upper()
 
 def text2banana(text):
-    text = re.sub(r"[0-9][0-9]*",callback,text)
-    return text
+    return re.sub(r"[0-9][0-9]*",callback,text)
 
 def callback_dec(x):
     b = x[0].strip().lower()
@@ -77,8 +65,7 @@ def callback_dec(x):
         return x[0]
 
 def text2dec(text):
-    text = re.sub(r"[A-Z][A-Z]*",callback_dec,text)
-    return text
+    return re.sub(r"[A-Z][A-Z]*",callback_dec,text)
 
 def get_selected_text():
     buf = vim.current.buffer
diff --git a/python/plugin/banana.vim b/python/plugin/banana.vim
index 7df2329..acf4e54 100644
--- a/python/plugin/banana.vim
+++ b/python/plugin/banana.vim
@@ -1,3 +1,7 @@
+" banana.vim - Convert Base Banana (https://git.lattuga.net/itec/banana) and back
+" T4 - totem4@tropici.net
+" Version: 0.1
+
 if exists("g:loaded_Banana") || &cp
 	finish
 endif