List directly bonded substituent first, followed by ortho substituents, alphabetically. Indicate ring system and position after number, in parentheses. For a phenyl substituent, V, list its two ortho substituents in lower case letters, alphabetically. Other rings are indicated using the codes described above, but using parentheses to indicate that the atom is part of a ring. If a methylene is in a ring, by definition, both of its substituents are in the ring.
Methyls can never be part of a ring.