The category "<company_id-not_creatable-sing>" can be expressed as follows:

<company_id-not_creatable-sing>

<company_type-not_creatable-sing>

<company_type-sing> <id_letter-sing>

<company_type-sing> <id_num-sing>

<id_letter-sing> <company_noun-sing>

<ordinal-sing> <company_type-sing>