diff --git a/2021/data/day14.expected b/2021/data/day14.expected
new file mode 100644
index 0000000..7c859d8
--- /dev/null
+++ b/2021/data/day14.expected
@@ -0,0 +1,2 @@
+2068
+2158894777814
diff --git a/2021/data/day14.input b/2021/data/day14.input
new file mode 100644
index 0000000..afdcf50
--- /dev/null
+++ b/2021/data/day14.input
@@ -0,0 +1,102 @@
+KFFNFNNBCNOBCNPFVKCP
+
+PB -> F
+KC -> F
+OB -> H
+HV -> N
+FS -> S
+CK -> K
+CC -> V
+HF -> K
+VP -> C
+CP -> S
+HO -> N
+OS -> N
+HS -> O
+HB -> F
+OH -> V
+PP -> B
+BS -> N
+VS -> F
+CN -> B
+KB -> O
+KH -> B
+SS -> K
+NS -> B
+BP -> V
+FB -> S
+PV -> O
+NB -> S
+FC -> F
+VB -> P
+PC -> O
+VF -> K
+BV -> K
+OO -> B
+PN -> N
+NH -> H
+SP -> B
+KF -> O
+BN -> F
+OF -> C
+VV -> H
+BB -> P
+KN -> H
+PO -> C
+BH -> O
+HC -> B
+VO -> O
+FV -> B
+PK -> V
+KO -> H
+BK -> V
+SC -> S
+KV -> B
+OV -> S
+HK -> F
+NP -> V
+VH -> P
+OK -> S
+SO -> C
+PF -> C
+SH -> N
+FP -> V
+CS -> C
+HH -> O
+KK -> P
+BF -> S
+NN -> O
+OC -> C
+CB -> O
+BO -> V
+ON -> F
+BC -> P
+NO -> N
+KS -> H
+FF -> V
+FN -> V
+HP -> N
+VC -> F
+OP -> K
+VN -> S
+NV -> F
+SV -> F
+FO -> V
+PS -> H
+VK -> O
+PH -> P
+NF -> N
+KP -> S
+CF -> S
+FK -> P
+FH -> F
+CO -> H
+SN -> B
+NC -> H
+SK -> P
+CV -> P
+CH -> H
+HN -> N
+SB -> H
+NK -> B
+SF -> H