added rest of the code

19/input1

@@ -0,0 +1,5 @@
+H => HO
+H => OH
+O => HH
+
+HOH

19/input2

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+e => H
+e => O
+H => HO
+H => OH
+O => HH
+
+HOHOHO

19/part1.py

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+#!/usr/bin/python
+
+import re
+
+RE_RULE = re.compile(r'^(.*) => (.*)$')
+
+
+def read_file(filename):
+    file = open(filename, 'r')
+    while True:
+        line = file.readline()
+        if not line:
+            break
+        yield line.strip()
+
+
+def apply_rule(formula, key, value):
+    keyLen = len(key)
+    formulaPos = 0
+
+#    print "formula: %s, key: %s, value: %s" % (formula, key, value)
+    while True:
+        pos = formula.find(key, formulaPos)
+#        print " - pos: %d" % (pos)
+        if pos < 0:
+            break
+        yield formula[0:pos] + value + formula[pos+keyLen:]
+        formulaPos = pos + keyLen
+
+
+def main():
+    formula = ""
+    rules = dict()
+    for line in read_file('input'):
+        # skip empty lines
+        if not line:
+            continue
+        match = re.match(RE_RULE, line)
+        if match:
+            if match.group(1) not in rules:
+                rules[match.group(1)] = []
+            rules[match.group(1)].append(match.group(2))
+        else:
+            formula = line
+
+    for k1, v1 in rules.iteritems():
+        for v2 in v1:
+            for r in apply_rule(formula, k1, v2):
+                print r
+
+
+if __name__ == "__main__":
+    main()

19/part2.py

@@ -0,0 +1,55 @@
+#!/usr/bin/python
+
+# solution borrowd from
+# https://www.reddit.com/r/adventofcode/comments/3xflz8/day_19_solutions/?sort=new
+
+import re
+from random import shuffle
+
+RE_RULE = re.compile(r'^(.*) => (.*)$')
+
+
+def read_file(filename):
+    file = open(filename, 'r')
+    while True:
+        line = file.readline()
+        if not line:
+            break
+        yield line.strip()
+
+def find_formula(formula, rules):
+    steps = 0
+    f = formula
+    while formula != 'e':
+        start = formula
+        for k,v in rules:
+            if v in formula:
+                steps += 1
+                formula = formula.replace(v, k, 1)
+
+        if formula == start:
+            shuffle(rules)
+            steps = 0
+            formula = f
+
+    return steps
+
+def main():
+    medicine = ""
+    rules = []
+    for line in read_file('input'):
+        # skip empty lines
+        if not line:
+            continue
+        match = re.match(RE_RULE, line)
+        if match:
+            rules.append((match.group(1), match.group(2)))
+        else:
+            medicine = line
+
+    print rules
+    print medicine
+    print find_formula(medicine, rules)
+
+if __name__ == "__main__":
+    main()

19/readme

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+## part1
+
+    python part1.py  | sort -u | wc -l
+
+## part2

README.md

@@ -1,2 +1,56 @@
-http://adventofcode.com/
+# Advent of Code
 
+These are my solition for the problem descriptions on the http://adventofcode.com/
+
+Of course, there could be better one
+
+- better code
+- less memory space used
+- faster
+
+## General notes
+
+In each directory teher are mostly 2 scripts `part1.py` and `part2.py`. Teh second one is the copy
+of the first one with modifications to fit the chnaged problem description.
+
+### Input
+There is in most cases file with name `input`. Yu can find tere the input data for the problem.
+Any other file prefixed with `input` is my testing data.
+
+For some solutions, the input is hardcoded in variable `input` in the code.
+
+### Output
+There are several output types
+
+- **integer** - paste this into the input box, it's a result
+- **bunch of lines* - you need to do sort/uniq/tail/head on this output
+
+See README in each directory for more informations.
+
+
+## Advent Days
+
+- **Day 1**: Not Quite Lisp
+- **Day 2**: I Was Told There Would Be No Math
+- **Day 3**: Perfectly Spherical Houses in a Vacuum
+- **Day 4**: The Ideal Stocking Stuffer
+- **Day 5**: Doesn't He Have Intern-Elves For This?
+- **Day 6**: Probably a Fire Hazard
+- **Day 7**: Some Assembly Required
+- **Day 8**: Matchsticks
+- **Day 9**: All in a Single Night
+- **Day 10**: Elves Look, Elves Say
+- **Day 11**: Corporate Policy
+- **Day 12**: JSAbacusFramework.io
+- **Day 13**: Knights of the Dinner Table
+- **Day 14**: Reindeer Olympics
+- **Day 15**: Science for Hungry People
+- **Day 16**: Aunt Sue
+- **Day 17**: No Such Thing as Too Much
+- **Day 18**: Like a GIF For Your Yard
+- **Day 19**: Medicine for Rudolph
+- **Day 20**: Infinite Elves and Infinite Houses
+- **Day 21**: RPG Simulator 20XX
+- **Day 22**: Wizard Simulator 20XX
+- **Day 23**: Opening the Turing Lock
+- **Day 24**: