diff --git a/meme_otron/utils.py b/meme_otron/utils.py
index 45d174e..285dab2 100644
--- a/meme_otron/utils.py
+++ b/meme_otron/utils.py
@@ -150,53 +150,10 @@ def find_nearest(word, wlist, threshold=5):
     return found[1]
 
 
-def safe_index(src, pattern, start=0):
-    """
-    :param (list|str) src:
-    :param pattern:
-    :param (int) start:
-    """
-    try:
-        return src.index(pattern, start)
-    except ValueError:
-        return None
-
-
-def find_all(src, pattern):
-    """
-    :param (str) src:
-    :param (str) pattern:
-    :rtype: list of int
-    """
-    o = []
-    i = safe_index(src, pattern)
-    while i is not None:
-        o += [i]
-        i = safe_index(src, pattern, i + 1)
-    return o
-
-
-def replace_at(src, pattern, indexes, remove):
-    """
-    :param (str) src:
-    :param (str) pattern:
-    :param (list of int) indexes:
-    :param (int) remove:
-    :rtype: str
-    """
-    o = ""
-    last = 0
-    for i in indexes:
-        o += src[last:i] + pattern
-        last = i + remove
-    o += src[last:]
-    return o
-
-
 def break_text(src, n):
     """
-    :param (str) src:
-    :param (int) n:
+    :param (str) src: source string
+    :param (int) n: number of lines
     :rtype: str
     """
     spaces = find_all(src, " ")
@@ -209,13 +166,48 @@ def break_text(src, n):
     return replace_at(src, "\n", indexes, 1)
 
 
+def find_all(src, pattern):
+    """
+    :param (str) src: source string
+    :param (str) pattern: pattern to find
+    :rtype: list of int
+    :return: all indexes of the pattern
+    """
+    o = []
+    i = safe_index(src, pattern)
+    while i is not None:
+        o += [i]
+        i = safe_index(src, pattern, i + 1)
+    return o
+
+
+def replace_at(src, pattern, indexes, remove):
+    """
+    :param (str) src: source string
+    :param (str) pattern: string to inject
+    :param (list of int) indexes: places to inject
+    :param (int) remove: how much to remove at each index
+    :rtype: str
+    :return
+    """
+    o = ""
+    last = 0
+    for i in indexes:
+        o += src[last:i] + pattern
+        last = i + remove
+    o += src[last:]
+    return o
+
+
 def best_fit(a, b):
     """
+    select for each item of a the closest item of b
+
     :param (list of float) a:
     :param (list of int) b:
     :rtype: list of int
     """
-    a = a[::]
+    a = a[:]
     o = []
     dist = sys.maxsize
     for i, value in enumerate(b):
@@ -229,3 +221,15 @@ def best_fit(a, b):
     if len(a):
         o += [b[-1]]
     return o
+
+
+def safe_index(src, pattern, start=0):
+    """
+    :param (list|str) src:
+    :param pattern:
+    :param (int) start:
+    """
+    try:
+        return src.index(pattern, start)
+    except ValueError:
+        return None