diff --git a/sample/day1-sample.txt b/sample/day01-sample.txt
similarity index 100%
rename from sample/day1-sample.txt
rename to sample/day01-sample.txt
diff --git a/sample/day2-sample.txt b/sample/day02-sample.txt
similarity index 100%
rename from sample/day2-sample.txt
rename to sample/day02-sample.txt
diff --git a/sample/day3-sample.txt b/sample/day03-sample.txt
similarity index 100%
rename from sample/day3-sample.txt
rename to sample/day03-sample.txt
diff --git a/sample/day3-sample2.txt b/sample/day03-sample2.txt
similarity index 100%
rename from sample/day3-sample2.txt
rename to sample/day03-sample2.txt
diff --git a/sample/day4-sample.txt b/sample/day04-sample.txt
similarity index 100%
rename from sample/day4-sample.txt
rename to sample/day04-sample.txt
diff --git a/sample/day5-sample.txt b/sample/day05-sample.txt
similarity index 100%
rename from sample/day5-sample.txt
rename to sample/day05-sample.txt
diff --git a/sample/day6-sample.txt b/sample/day06-sample.txt
similarity index 100%
rename from sample/day6-sample.txt
rename to sample/day06-sample.txt
diff --git a/sample/day7-sample.txt b/sample/day07-sample.txt
similarity index 100%
rename from sample/day7-sample.txt
rename to sample/day07-sample.txt
diff --git a/sample/day8-sample.txt b/sample/day08-sample.txt
similarity index 100%
rename from sample/day8-sample.txt
rename to sample/day08-sample.txt
diff --git a/sample/day8-sample2.txt b/sample/day08-sample2.txt
similarity index 100%
rename from sample/day8-sample2.txt
rename to sample/day08-sample2.txt
diff --git a/sample/day9-sample.txt b/sample/day09-sample.txt
similarity index 100%
rename from sample/day9-sample.txt
rename to sample/day09-sample.txt
diff --git a/sample/day9-sample2.txt b/sample/day09-sample2.txt
similarity index 100%
rename from sample/day9-sample2.txt
rename to sample/day09-sample2.txt
diff --git a/sample/day10-sample.txt b/sample/day10-sample.txt
new file mode 100644
index 0000000..cada9b3
--- /dev/null
+++ b/sample/day10-sample.txt
@@ -0,0 +1,8 @@
+89010123
+78121874
+87430965
+96549874
+45678903
+32019012
+01329801
+10456732
diff --git a/src/day1_p1.gleam b/src/day01_p1.gleam
similarity index 100%
rename from src/day1_p1.gleam
rename to src/day01_p1.gleam
diff --git a/src/day1_p2.gleam b/src/day01_p2.gleam
similarity index 100%
rename from src/day1_p2.gleam
rename to src/day01_p2.gleam
diff --git a/src/day2_p1.gleam b/src/day02_p1.gleam
similarity index 100%
rename from src/day2_p1.gleam
rename to src/day02_p1.gleam
diff --git a/src/day2_p2.gleam b/src/day02_p2.gleam
similarity index 100%
rename from src/day2_p2.gleam
rename to src/day02_p2.gleam
diff --git a/src/day3_p1.gleam b/src/day03_p1.gleam
similarity index 100%
rename from src/day3_p1.gleam
rename to src/day03_p1.gleam
diff --git a/src/day3_p2.gleam b/src/day03_p2.gleam
similarity index 100%
rename from src/day3_p2.gleam
rename to src/day03_p2.gleam
diff --git a/src/day4_p1.gleam b/src/day04_p1.gleam
similarity index 100%
rename from src/day4_p1.gleam
rename to src/day04_p1.gleam
diff --git a/src/day4_p2.gleam b/src/day04_p2.gleam
similarity index 100%
rename from src/day4_p2.gleam
rename to src/day04_p2.gleam
diff --git a/src/day5_p1.gleam b/src/day05_p1.gleam
similarity index 100%
rename from src/day5_p1.gleam
rename to src/day05_p1.gleam
diff --git a/src/day5_p2.gleam b/src/day05_p2.gleam
similarity index 100%
rename from src/day5_p2.gleam
rename to src/day05_p2.gleam
diff --git a/src/day6_p1.gleam b/src/day06_p1.gleam
similarity index 100%
rename from src/day6_p1.gleam
rename to src/day06_p1.gleam
diff --git a/src/day6_p2.gleam b/src/day06_p2.gleam
similarity index 100%
rename from src/day6_p2.gleam
rename to src/day06_p2.gleam
diff --git a/src/day7_p1.gleam b/src/day07_p1.gleam
similarity index 100%
rename from src/day7_p1.gleam
rename to src/day07_p1.gleam
diff --git a/src/day7_p2.gleam b/src/day07_p2.gleam
similarity index 100%
rename from src/day7_p2.gleam
rename to src/day07_p2.gleam
diff --git a/src/day8_p1.gleam b/src/day08_p1.gleam
similarity index 100%
rename from src/day8_p1.gleam
rename to src/day08_p1.gleam
diff --git a/src/day8_p2.gleam b/src/day08_p2.gleam
similarity index 100%
rename from src/day8_p2.gleam
rename to src/day08_p2.gleam
diff --git a/src/day9_p1.gleam b/src/day09_p1.gleam
similarity index 100%
rename from src/day9_p1.gleam
rename to src/day09_p1.gleam
diff --git a/src/day9_p2.gleam b/src/day09_p2.gleam
similarity index 100%
rename from src/day9_p2.gleam
rename to src/day09_p2.gleam