diff --git a/solutions/elixir/bob/1/lib/bob.ex b/solutions/elixir/bob/1/lib/bob.ex
new file mode 100644
index 0000000..5aedcc8
--- /dev/null
+++ b/solutions/elixir/bob/1/lib/bob.ex
@@ -0,0 +1,16 @@
+defmodule Bob do
+  @spec hey(String.t()) :: String.t()
+  def hey(input) do
+    is_question = input |> String.trim() |> String.last() == "?"
+    is_yelling = String.upcase(input) == input and Regex.match?(~r/\p{Lu}/u, input)
+    is_silent = !Regex.match?(~r/\S/u, input)
+    
+    cond do
+      is_silent -> "Fine. Be that way!"
+      is_question and is_yelling -> "Calm down, I know what I'm doing!"
+      is_question -> "Sure."
+      is_yelling -> "Whoa, chill out!"
+      true -> "Whatever."
+    end
+  end
+end