% "Learn Prolog Now!" Exercise 2.4

word(abalone,a,b,a,l,o,n,e). 
word(abandon,a,b,a,n,d,o,n). 
word(enhance,e,n,h,a,n,c,e). 
word(anagram,a,n,a,g,r,a,m). 
word(connect,c,o,n,n,e,c,t). 
word(elegant,e,l,e,g,a,n,t).
word(astante,  a,s,t,a,n,t,e).
word(astoria,  a,s,t,o,r,i,a).
word(baratto,  b,a,r,a,t,t,o).
word(cobalto,  c,o,b,a,l,t,o).
word(pistola,  p,i,s,t,o,l,a).
word(statale,  s,t,a,t,a,l,e). 

crossword(V1,V2,V3,H1,H2,H3) :-
	word(V1,_,H1V1,_,H2V1,_,H3V1,_),
	word(V2,_,H1V2,_,H2V2,_,H3V2,_),
	word(V3,_,H1V3,_,H2V3,_,H3V3,_),
	word(H1,_,H1V1,_,H1V2,_,H1V3,_),
	word(H2,_,H2V1,_,H2V2,_,H2V3,_),
	word(H3,_,H3V1,_,H3V2,_,H3V3,_).