B P  A Q  D T  E R  C S 
C T  A Q  D S  E R  B P 
C T  A Q  D P  E R  B S 
B T  A Q  D P  E R  C S 
B P  E Q  D T  A R  C S 
C T  E Q  D S  A R  B P 
C T  E Q  D P  A R  B S 
B T  E Q  D P  A R  C S 
