ap1w bp1we cp1we2 dp1w ep1we

zf2we 0f2we2 1f2w 2f2we 3f2we2

o62we2 p62w q62we r62we2 s62w

dx3w ex3we fx3we2 gx3w hx3we

2n4we 3n4we2 4n4w 5n4we 6n4we2