The document lists the 7 major chords on guitar: CM, DM, EM, FM, GM, AM, BM. These represent the major chords for the notes C, D, E, F, G, A, and B respectively when played on guitar.

1. Acordes Guitarra Mayores
CM DM EM FM
(Do Mayor) (Re Mayor) (Mi Mayor) (Fa Mayor)
GM AM BM
(Sol Mayor) (La Mayor) (Si Mayor)