diff --git a/2022/03/data.txt b/2022/03/data.txt
new file mode 100644
index 0000000..d0ad78f
--- /dev/null
+++ b/2022/03/data.txt
@@ -0,0 +1,300 @@
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diff --git a/2022/03/demo.txt b/2022/03/demo.txt
new file mode 100644
index 0000000..f17e726
--- /dev/null
+++ b/2022/03/demo.txt
@@ -0,0 +1,6 @@
+vJrwpWtwJgWrhcsFMMfFFhFp
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diff --git a/2022/03/part1.py b/2022/03/part1.py
new file mode 100644
index 0000000..f0ebea8
--- /dev/null
+++ b/2022/03/part1.py
@@ -0,0 +1,55 @@
+def load(filename):
+	with open(filename) as f:
+		for l in f:
+			s = l.rstrip()
+			n = len(s)
+			offset = int(n/2)
+			c1 = s[0:offset]
+			c2 = s[offset:]
+			yield c1, c2
+
+
+def overlap(c1, c2):
+	return list(set(c1).intersection(set(c2)))[0]
+
+def priority(c):
+	n = ord(c)
+
+	if ord("a") <= n <= ord("z"):
+		return n - ord("a") + 1
+	if ord("A") <= n <= ord("Z"):
+		return n - ord("A") + 27
+
+	raise Exception()
+
+def calcsum(l):
+	l = [overlap(*x) for x in l]
+	t = sum([priority(*x) for x in l])
+	return t
+
+
+l = list(load("demo.txt"))
+assert "".join(l[0]) == "vJrwpWtwJgWrhcsFMMfFFhFp"
+assert l[0][0] == "vJrwpWtwJgWr"
+assert l[0][1] == "hcsFMMfFFhFp"
+assert overlap(*l[0]) == "p"
+
+assert l[1] == ("jqHRNqRjqzjGDLGL", "rsFMfFZSrLrFZsSL")
+assert overlap(*l[1]) == "L"
+
+assert l[2] == ("PmmdzqPrV", "vPwwTWBwg")
+assert overlap(*l[2]) == "P"
+
+assert overlap(*l[3]) == "v"
+assert overlap(*l[4]) == "t"
+assert overlap(*l[5]) == "s"
+
+assert priority("a") == 1
+assert priority("z") == 26
+assert priority("A") == 27
+assert priority("Z") == 52
+
+assert calcsum(l) == 157
+
+l = load("data.txt")
+print("Sum is:", calcsum(l))
diff --git a/2022/03/part2.py b/2022/03/part2.py
new file mode 100644
index 0000000..f02623f
--- /dev/null
+++ b/2022/03/part2.py
@@ -0,0 +1,50 @@
+from itertools import islice
+
+
+def _load(filename):
+	with open(filename) as f:
+		for l in f:
+			yield l.rstrip()
+
+
+def load(filename):
+	f = list(_load(filename))
+	for j in range(0, int(len(f) / 3)):
+		i = j*3
+		yield f[i], f[i+1], f[i+2]
+
+
+def overlap(c1, c2, c3):
+	return list(set(c1).intersection(set(c2)).intersection(set(c3)))[0]
+
+def priority(c):
+	n = ord(c)
+
+	if ord("a") <= n <= ord("z"):
+		return n - ord("a") + 1
+	if ord("A") <= n <= ord("Z"):
+		return n - ord("A") + 27
+
+	raise Exception()
+
+def calcsum(l):
+	l = [overlap(*x) for x in l]
+	t = sum([priority(*x) for x in l])
+	return t
+
+assert priority("a") == 1
+assert priority("z") == 26
+assert priority("A") == 27
+assert priority("Z") == 52
+
+l = list(load("demo.txt"))
+assert l[0] == ("vJrwpWtwJgWrhcsFMMfFFhFp", "jqHRNqRjqzjGDLGLrsFMfFZSrLrFZsSL", "PmmdzqPrVvPwwTWBwg")
+assert l[1] == ("wMqvLMZHhHMvwLHjbvcjnnSBnvTQFn", "ttgJtRGJQctTZtZT", "CrZsJsPPZsGzwwsLwLmpwMDw")
+
+assert overlap(*l[0]) == "r"
+assert overlap(*l[1]) == "Z"
+
+assert calcsum(l) == 70
+
+l = list(load("data.txt"))
+print("Sum is:", calcsum(l))