diff --git a/d04/part1.awk b/d04/part1.awk
new file mode 100644
index 0000000..4f139bc
--- /dev/null
+++ b/d04/part1.awk
@@ -0,0 +1,3 @@
+# awk -F ',|-' -f part1.awk input
+($3>=$1 && $4<=$2) || ($1>=$3 && $2<=$4) {n++}
+END {print n}
diff --git a/d04/part2.awk b/d04/part2.awk
new file mode 100644
index 0000000..ce52f97
--- /dev/null
+++ b/d04/part2.awk
@@ -0,0 +1,3 @@
+# awk -F ',|-' -f part2.awk input
+$3>$2 || $1 > $4 {n++}
+END {print NR-n}