#define DEFAULT_GRAMMAR "Cvccvc!##"

// For vowels:
//   i, o excluded due to potentially confusing 1/l/i + 0/o
//   y included as a vowel because it kinda is one
#define CLASSES \
  CLASS('v', "aeuy") \
  CLASS('c', "bcdfghkmnprstvwxz") \
  CLASS('#', "1234567890") \
  CLASS('!', "@#$%^&*_-+=()[]{}")