pk1,pk2,pk3,content
b,b,w,b-b-w
b,b,x,b-b-x
b,b,y,b-b-y
b,b,z,b-b-z
a,c,a,a-c-a
a,c,b,a-c-b
a,c,c,a-c-c
a,c,d,a-c-d
a,c,e,a-c-e
a,c,f,a-c-f
a,c,g,a-c-g
a,c,h,a-c-h
a,c,i,a-c-i
a,c,j,a-c-j
a,c,k,a-c-k
a,c,l,a-c-l
a,c,m,a-c-m
a,c,n,a-c-n
a,c,o,a-c-o
a,c,p,a-c-p
a,c,q,a-c-q
a,c,r,a-c-r
a,c,s,a-c-s
a,c,t,a-c-t
a,c,u,a-c-u
a,c,v,a-c-v
a,c,w,a-c-w
a,c,x,a-c-x
a,c,y,a-c-y
a,c,z,a-c-z
b,c,a,b-c-a
b,c,b,b-c-b
b,c,c,b-c-c
b,c,d,b-c-d
b,c,e,b-c-e
b,c,f,b-c-f
b,c,g,b-c-g
b,c,h,b-c-h
b,c,i,b-c-i
b,c,j,b-c-j
b,c,k,b-c-k
b,c,l,b-c-l
b,c,m,b-c-m
b,c,n,b-c-n
b,c,o,b-c-o
b,c,p,b-c-p
b,c,q,b-c-q
b,c,r,b-c-r
b,c,s,b-c-s
b,c,t,b-c-t
b,c,u,b-c-u
b,c,v,b-c-v
b,c,w,b-c-w
b,c,x,b-c-x
b,c,y,b-c-y
b,c,z,b-c-z
a,d,a,a-d-a
a,d,b,a-d-b
a,d,c,a-d-c
a,d,d,a-d-d
a,d,e,a-d-e
a,d,f,a-d-f
a,d,g,a-d-g
a,d,h,a-d-h
a,d,i,a-d-i
a,d,j,a-d-j
a,d,k,a-d-k
a,d,l,a-d-l
a,d,m,a-d-m
a,d,n,a-d-n
a,d,o,a-d-o
a,d,p,a-d-p
a,d,q,a-d-q
a,d,r,a-d-r
a,d,s,a-d-s
a,d,t,a-d-t
a,d,u,a-d-u
a,d,v,a-d-v
a,d,w,a-d-w
a,d,x,a-d-x
a,d,y,a-d-y
a,d,z,a-d-z
b,d,a,b-d-a
b,d,b,b-d-b
b,d,c,b-d-c
b,d,d,b-d-d
b,d,e,b-d-e
b,d,f,b-d-f
b,d,g,b-d-g
b,d,h,b-d-h
b,d,i,b-d-i
b,d,j,b-d-j
b,d,k,b-d-k
b,d,l,b-d-l
b,d,m,b-d-m
b,d,n,b-d-n
b,d,o,b-d-o
b,d,p,b-d-p
b,d,q,b-d-q
b,d,r,b-d-r
b,d,s,b-d-s