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