eq(f1(A,B,C,D,E,F,G,H,I,J),1,[f2(A,B,C,D,E,F,G,K,L,K,M,N,O,P,Q,R,S,T,U,V,W),loop_cont_f2(N,O,P,Q,R,S,T,U,V,W)],[M=0]).
eq(f1(A,B,C,D,E,F,G,H,I,J),1,[f2(A,B,C,D,E,F,G,K,L,K,M,N,O,P,Q,R,S,T,U,V,W)],[M=1]).
eq(f2(A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U),1,[f2(A,V,W,X,Y,Z,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U)],[A>=1]).
eq(f2(A,B,C,D,E,F,G,H,I,J,K,A,L,M,D,E,F,N,H,I,J),1,[],[K=1,0>=A]).