Uppercase (A, B or C) = clock-wise winding (CW)
Lowercase (a, b or c) = counter clock-wise winding (CCW)
Eg. AaBbCc means:
phase/wire 1: wind tooth 1 CW, continue to tooth 2 and wind it CCW
phase/wire 2: wind tooth 3 CW, continue to tooth 4 and wind it CCW
phase/wire 3: wind tooth 5 CW, continue to tooth 6 and wind it CCW