diff --git a/flx/__init__.py b/flx/__init__.py
index 84eba1a..dea2b96 100644
--- a/flx/__init__.py
+++ b/flx/__init__.py
@@ -1,8 +1,7 @@
 """
 flx: Fuzzy matching... a la Sublime Text.
-
 """
 
-__shortname__   = "flx"
-__longname__    = "flx: Fuzzy matching... a la Sublime Text"
-__version__     = "0.1.0"
+__shortname__ = "flx"
+__longname__  = "flx: Fuzzy matching... a la Sublime Text"
+__version__   = "0.1.0"
diff --git a/flx/flx.py b/flx/flx.py
index 4090cfa..1489433 100644
--- a/flx/flx.py
+++ b/flx/flx.py
@@ -1,3 +1,5 @@
+from . import util
+
 word_separators = [ ' ', '-', '_', ':', '.', '/', '\\', ]
 
 default_score = -35
@@ -30,4 +32,38 @@ def boundary(last_ch, ch):
 
 def inc_vec(vec, inc, beg, end):
     """Increment each element in `vec` between `beg` and `end` by `inc`."""
-    pass
+    inc = inc or 1
+    beg = beg or 0
+    end = end or len(vec)
+
+    while beg < end:
+        vec[beg] += inc
+        beg += 1
+
+    return vec
+
+def get_hash_for_string(str):
+    """Return hash-table for string where keys are characters.
+
+    Value is a sorted list of indexes for character occurrences.
+    """
+    result = {}
+
+    str_len = len(str)
+    index = str_len - 1
+
+    while 0 <= index:
+        ch = str[index]
+
+        if capital(ch):
+            result = util.dict_insert(result, ch, index)
+
+            down_ch = ch.lower()
+        else:
+            down_ch = ch
+
+        result = util.dict_insert(result, down_ch, index)
+
+        index -= 1
+
+    return result
diff --git a/flx/util.py b/flx/util.py
new file mode 100644
index 0000000..a098925
--- /dev/null
+++ b/flx/util.py
@@ -0,0 +1,24 @@
+def dict_set(dict, key, val):
+    if key is None:
+        return
+
+    dict[key] = val
+
+    return dict
+
+def dict_get(dict, key):
+    if key is None:
+        return None
+
+    if not key in dict.keys():
+        return None
+
+    return dict[key]
+
+def dict_insert(dict, key, val):
+    if not key in dict.keys():
+        dict[key] = []
+
+    dict[key].insert(0, val)
+
+    return dict
diff --git a/test/test_flx.py b/test/test_flx.py
index 63fad8d..a77debb 100644
--- a/test/test_flx.py
+++ b/test/test_flx.py
@@ -16,3 +16,26 @@ def test_capital():
     assert flx.capital('c') == False
     assert flx.capital(' ') == False
     pass
+
+def test_inc_vec():
+    assert flx.inc_vec([1, 2, 3], 1, 0, None) == [2, 3, 4]
+    assert flx.inc_vec([1, 2, 3], 1, 1, None) == [1, 3, 4]
+    pass
+
+def test_get_hash_for_string():
+    assert flx.get_hash_for_string("switch-to-buffer") == {
+        'r': [15],
+        'e': [14],
+        'f': [12, 13],
+        'u': [11],
+        'b': [10],
+        '-': [6, 9],
+        'o': [8],
+        't': [3, 7],
+        'h': [5],
+        'c': [4],
+        'i': [2],
+        'w': [1],
+        's': [0]
+        }
+    pass