diff --git a/notes/strength.txt b/notes/strength.txt
index f24b06e..b402a5b 100644
--- a/notes/strength.txt
+++ b/notes/strength.txt
@@ -1,26 +1,35 @@
 # Gibberish
 # This is our entropy target
+# 8 characters
 [A-Z][a-z][0-9] * 8
 	26 + 26 + 10 = 62
 	62 ^ 8 = 2.1E14
 
 # Gibberish, visually distinct
+# 8 characters
 ([A-Z][a-z][0-9] - [IOlo01]) * 8
 	26 + 26 + 10 - 6 = 56
 	56 ^ 8 = 9.6E13
 
 # Readable
+# <= 32 characters
+# Validation failures: too long, no numbers
 5776 words * 4
 	5776 ^ 4 = 1.1E15
 
 # Readable + numbers
+# <= 27 characters
+# Validation failures: too long
 (5776 words * 3) + ([0-9] * 3)
 	(5776 ^ 3) * (10 ^ 3) = 1.9E14
 
 # Readable + visually clear numbers
+# <= 27 characters
+# Validation failures: too long
 (5776 words * 3) + ([0-9] - [01] * 3)
 	(5776 ^ 3) * (8 ^ 3) = 9.8E13
 
 # Pronounceable
-(([BCDFGHJKMNPQRSTVWXYZ] + [AEU]) * 7) + ([0-9] - [01] * 2)
+# 16 characters
+(([BCDFGHJKMNPQRSTVWXYZ] + [aeu]) * 7) + ([0-9] - [01] * 2)
 	((20 * 3) ^ 7) * (8 ^ 2) = 1.7E14