Two names for the same function
Do–Re–Mi–Fa–Sol–La–Ti correspond to degrees 1–7. Upper Do is degree 8 and simultaneously a new degree 1. Practise both directions until number and syllable immediately evoke each other.
Do
Degree 1
Re
Degree 2
Mi
Degree 3
Fa
Degree 4
Sol
Degree 5
La
Degree 6
Ti
Degree 7
Do↑
Degree 8 / 1