diff --git a/day19/input b/day19/input
new file mode 100644
index 0000000..8bb6fa8
--- /dev/null
+++ b/day19/input
@@ -0,0 +1,45 @@
+Al => ThF
+Al => ThRnFAr
+B => BCa
+B => TiB
+B => TiRnFAr
+Ca => CaCa
+Ca => PB
+Ca => PRnFAr
+Ca => SiRnFYFAr
+Ca => SiRnMgAr
+Ca => SiTh
+F => CaF
+F => PMg
+F => SiAl
+H => CRnAlAr
+H => CRnFYFYFAr
+H => CRnFYMgAr
+H => CRnMgYFAr
+H => HCa
+H => NRnFYFAr
+H => NRnMgAr
+H => NTh
+H => OB
+H => ORnFAr
+Mg => BF
+Mg => TiMg
+N => CRnFAr
+N => HSi
+O => CRnFYFAr
+O => CRnMgAr
+O => HP
+O => NRnFAr
+O => OTi
+P => CaP
+P => PTi
+P => SiRnFAr
+Si => CaSi
+Th => ThCa
+Ti => BP
+Ti => TiTi
+e => HF
+e => NAl
+e => OMg
+
+ORnPBPMgArCaCaCaSiThCaCaSiThCaCaPBSiRnFArRnFArCaCaSiThCaCaSiThCaCaCaCaCaCaSiRnFYFArSiRnMgArCaSiRnPTiTiBFYPBFArSiRnCaSiRnTiRnFArSiAlArPTiBPTiRnCaSiAlArCaPTiTiBPMgYFArPTiRnFArSiRnCaCaFArRnCaFArCaSiRnSiRnMgArFYCaSiRnMgArCaCaSiThPRnFArPBCaSiRnMgArCaCaSiThCaSiRnTiMgArFArSiThSiThCaCaSiRnMgArCaCaSiRnFArTiBPTiRnCaSiAlArCaPTiRnFArPBPBCaCaSiThCaPBSiThPRnFArSiThCaSiThCaSiThCaPTiBSiRnFYFArCaCaPRnFArPBCaCaPBSiRnTiRnFArCaPRnFArSiRnCaCaCaSiThCaRnCaFArYCaSiRnFArBCaCaCaSiThFArPBFArCaSiRnFArRnCaCaCaFArSiRnFArTiRnPMgArF
diff --git a/day19/solution.rb b/day19/solution.rb
new file mode 100755
index 0000000..5cd2dbc
--- /dev/null
+++ b/day19/solution.rb
@@ -0,0 +1,51 @@
+#!/bin/env ruby
+require 'pry'
+
+input = File.readlines('./input').map(&:chomp)
+starting_molecule = input.pop.scan(/[A-Z][a-z]?/)
+starting_molecule.freeze
+input.pop
+
+input.map! { |pair| pair.split('=>').map(&:strip) }
+results = []
+
+starting_molecule.each.with_index do |element, i|
+  input.each do |pair|
+    next unless pair[0] == element
+
+    molecule = starting_molecule.dup
+    molecule[i] = pair[1]
+    results.push(molecule.reduce(&:+))
+  end
+end
+
+puts "Part 1 Solution: #{results.uniq.count}"
+# binding.pry
+
+result = starting_molecule.reduce(&:+)
+count = 0
+counts = []
+100.times do
+  until result == 'e'
+    previous = result.dup
+    matches = input.map do |pair|
+      # pair[1].scan(/[A-Z]/).size * result.scan(pair[1]).size
+      result.scan(pair[1]).size
+    end
+    match = matches.find_index(matches.reject(&:zero?).sample)
+    result.gsub!(input[match][1], input[match][0]) unless match.nil?
+    count += matches[match] unless match.nil?
+    next unless previous == result
+
+    input.shuffle!
+    count == 0
+    result = starting_molecule.reduce(&:+)
+    # break if gets.chomp == 'q'
+  end
+  result = starting_molecule.reduce(&:+)
+  input.shuffle!
+  counts.push(count)
+  count = 0
+end
+
+puts "Part 2 Solution: #{counts.min}"