diff --git a/README.adoc b/README.adoc
index 50b4828..1991adc 100644
--- a/README.adoc
+++ b/README.adoc
@@ -45,7 +45,7 @@ This shape is also used as an in-between when animating from {A} or {B} to {D}.
 | Wide open mouth. This mouth shapes is used for vowels like "`AA`" as in f**a**ther, "`AE`" as in b**a**t, and "`AY`" as in wh**y**.
 
 | {E} | image:img/ken-E.png[]
-| Slightly rounded mouth. This mouth shape is used for vowels like "`AO`" as in **o**ff, "`UH`" as in sh**ou**ld, and "`OW`" as in sh**o**w.
+| Slightly rounded mouth. This mouth shape is used for vowels like "`AO`" as in **o**ff.
 
 This shape is also used as an in-between when animating from {C} or {D} to {F}. Make sure the mouth isn't wider open than for {C}. Both {C}{E}{F} and {D}{E}{F} should result in smooth animation.
 
diff --git a/src/core/Shape.h b/src/core/Shape.h
index d7bef40..b211146 100644
--- a/src/core/Shape.h
+++ b/src/core/Shape.h
@@ -6,15 +6,21 @@
 // For reference, see http://sunewatts.dk/lipsync/lipsync/article_02.php
 // For visual examples, see https://flic.kr/s/aHsj86KR4J. Their shapes "BMP".."L" map to A..H.
 enum class Shape {
-	A,	// Closed mouth (silence, M, B, P)
-	B,	// Clenched teeth (most vowels, m[e]n)
-	C,	// Mouth slightly open (b[ir]d, s[ay], w[i]n...)
-	D,	// Mouth wide open (b[u]t, m[y], sh[ou]ld...)
-	E,	// h[ow]
-	F,	// Pout ([o]ff, sh[ow])
-	G,	// F, V
-	H,	// L
+	// Basic shapes
+	
+	A,	// Closed mouth (M, B, P)
+	B,	// Clenched teeth (most consonants, some vowels like EE as in b[ee])
+	C,	// Open mouth (vowels like m[e]n, s[u]n, s[a]y)
+	D,	// Mouth wide open (vowels like f[a]ther, b[a]t, wh[y])
+	E,	// Rounded mouth (vowels like [o]ff)
+	F,	// Puckered lips (y[ou], b[o]y, [w]ay)
+
+	// Extended shapes
+
+	G,	// "F", "V"
+	H,	// "L"
 	X,	// Idle
+
 	EndSentinel
 };