The five most common types of foot in English poetry are iamb (v ), trochee ( v), dactyl ( vv), spondee ( ), and anapaest (vv ); the symbol v stands for an unstressed syllable and for a stressed one.
The emblem was added to distinguish the flag from that of Italy. The design is based on the French tricolour. The colours are those of the Mexican liberation army. Effective date: 23 November 1968.