diff --git a/problems/valid-phone-numbers/file.txt b/problems/valid-phone-numbers/file.txt
new file mode 100644
index 000000000..ab5499cd4
--- /dev/null
+++ b/problems/valid-phone-numbers/file.txt
@@ -0,0 +1,3 @@
+987-123-4567
+123 456 7890
+(123) 456-7890
diff --git a/problems/valid-phone-numbers/valid_phone_numbers.bash b/problems/valid-phone-numbers/valid_phone_numbers.bash
new file mode 100755
index 000000000..ebdf6316c
--- /dev/null
+++ b/problems/valid-phone-numbers/valid_phone_numbers.bash
@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+
+# Read from the file file.txt and output all valid phone numbers to stdout.
+
+grep -P '^(\d{3}-|\(\d{3}\) )\d{3}-\d{4}$' file.txt
diff --git a/problems/valid-phone-numbers/valid_phone_numbers.go b/problems/valid-phone-numbers/valid_phone_numbers.go
deleted file mode 100644
index 39c7ce712..000000000
--- a/problems/valid-phone-numbers/valid_phone_numbers.go
+++ /dev/null
@@ -1 +0,0 @@
-package valid_phone_numbers
diff --git a/problems/valid-phone-numbers/valid_phone_numbers_test.go b/problems/valid-phone-numbers/valid_phone_numbers_test.go
deleted file mode 100644
index 39c7ce712..000000000
--- a/problems/valid-phone-numbers/valid_phone_numbers_test.go
+++ /dev/null
@@ -1 +0,0 @@
-package valid_phone_numbers