I solved task 2 first and got confused

1 files changed, 35 insertions, 0 deletions

diff --git a/challenge-053/dave-jacoby/node/ch-2.js b/challenge-053/dave-jacoby/node/ch-2.js
new file mode 100644
index 0000000000..b0cd5fa3c6
--- /dev/null
+++ b/challenge-053/dave-jacoby/node/ch-2.js
@@ -0,0 +1,35 @@
+#!/usr/bin/env node
+
+vowel_strings(2);
+
+function vowel_strings(max_len, str = '') {
+  if (str.length === max_len) {
+    console.log(str);
+    return;
+  }
+  var next = [];
+  var last = '';
+
+  if (str.length > 0) {
+    last = str.substring(-1, 1);
+  }
+
+  if (str === '') {
+    next = ['a', 'e', 'i', 'o', 'u'];
+  } else if (last === 'a') {
+    next = ['e', 'i'];
+  } else if (last === 'e') {
+    next = ['i'];
+  } else if (last === 'i') {
+    next = ['a', 'e', 'o', 'u'];
+  } else if (last === 'o') {
+    next = ['a', 'u'];
+  } else if (last === 'u') {
+    next = ['e', 'o'];
+  }
+
+  const iter = next.values();
+  for (const i of iter) {
+    vowel_strings(max_len, str + i);
+  }
+}