diff --git a/src/day3.py b/src/day3.py
new file mode 100644
index 0000000..c792e0d
--- /dev/null
+++ b/src/day3.py
@@ -0,0 +1,60 @@
+import string
+from typing import Optional
+
+from cpl_core.console import Console
+from cpl_core.utils import String
+from cpl_query.enumerable import Enumerable
+from cpl_query.extension import List
+from cpl_core.pipes import *
+
+from aoc.aoc import get_input
+
+# global vars
+day = 3
+aoc_input = get_input(2022, day)
+# aoc_input = """vJrwpWtwJgWrhcsFMMfFFhFp
+# jqHRNqRjqzjGDLGLrsFMfFZSrLrFZsSL
+# PmmdzqPrVvPwwTWBwg
+# wMqvLMZHhHMvwLHjbvcjnnSBnvTQFn
+# ttgJtRGJQctTZtZT
+# CrZsJsPPZsGzwwsLwLmpwMDw
+# """
+
+priorities = [*string.ascii_lowercase, *string.ascii_uppercase]
+
+
+def part1() -> int:
+    duplicates = {}
+    for rucksack in aoc_input.splitlines():
+
+        c1, c2 = rucksack[:len(rucksack) // 2], rucksack[len(rucksack) // 2:]
+
+        r_duplicates = List(str, c1).select(lambda x: x if x in c2 else '').where(lambda x: x != '')
+        if r_duplicates.first() not in duplicates:
+            duplicates[r_duplicates.first()] = 0
+
+        duplicates[r_duplicates.first()] += r_duplicates.select(lambda x: priorities.index(x) + 1).distinct().sum()
+
+    return sum(duplicates.values())
+
+
+def part2() -> int:
+    groups = List(List)
+    index = 0
+    for rucksack in aoc_input.splitlines():
+        if index == 0:
+            groups.append(List(str))
+
+        index += 1
+        if index == 3:
+            index = 0
+
+        groups.last().append(rucksack)
+
+    return groups.select(lambda g: List(str, ''.join(g)).distinct().where(lambda x: x in g[0] and x in g[1] and x in g[2]).single()).select(lambda x: priorities.index(x) + 1).sum()
+
+
+if __name__ == '__main__':
+    Console.write_line(f'Advent of code day {day}')
+    Console.write_line(part1(), part2())
+    Console.write_line()