I noticed what Incidents Happen said was right, but I just wanted to add something since he was naming the modes, he used C as major and A as minor. They also have modes names too..
C Ionian (major)
D Dorian
E Phrygian
F Lydian
G Mixolydian
A Aeolian (minor)
B locrian
"My whole life is a dark room...ONE BIG DARK ROOM" - a.f.i.