Basics of piano

The most common piano chords include:
A major (A). A - C# - E.
A minor (Am). A - C - E.
C major (C). C - E - G.
C minor (Cm). C - Eb - G.
D major (D). D - F# - A.
D minor (Dm). D - F - A.
E major (E). E - G# - B.
E minor (Em). E - G - B.