Do - Represents the first (or tonic) scale degree
Re - Represents the second (or supertonic) scale degree
Mi - Represents the third (or mediant) scale degree
Fa - Represents the fourth (or subdominant) scale degree
Sol - Represents the fifth (or dominant) scale degree
La - Represents the sixth (or submediant) scale degree
Ti - Represents the seventh (or leading tone) scale degree