1 files changed, 23 insertions, 0 deletions
diff --git a/2020/06/puzzle-2.awk b/2020/06/puzzle-2.awk
new file mode 100755
index 0000000..98224ac
--- /dev/null
+++ b/2020/06/puzzle-2.awk
@@ -0,0 +1,23 @@
+#!/usr/bin/env -S awk -f
+
+BEGIN {
+	RS = ""
+	FS = "\n"
+}
+
+{
+	for (i = 1; i <= NF; i++) {
+		len = split($i, answers, "")
+		for (j = 1; j <= len; j++)
+			count[answers[j]]++
+	}
+
+	for (i in count) {
+		if (count[i] == NF)
+			sum++
+	}
+
+	delete count
+}
+
+END { print sum }