The "E" in E-1 stands for "enlisted" though the "one" suggests the paygrade for that situation. The opposite fork out categories are "W" for warrant officers and "O" for commissioned officers. Some enlisted paygrades have two ranks. The algorithm can be applied to any collection of entities with reciprocal quotations https://www.seoclerk.com/Link-Building/371800/GIGA-SEO-PACKAGE-POWERFUL-BACKLINKS