Total slots per phase =12/3=4 slots to be occupied.
Slots per pole per phase = 12/(3*4)=1
hence for papil A phase, the slots to be occupied are 1,4,7,10;for B phase, the slots to be occupied are 5,8,11,2;for C phase, the slots to be occupied are 9,12,3,6 and winding to we wave type.