eq(f2(A,B,C,D),1,[f0(0,B,C,D,E,F,G,H,I),loop_cont_f0(F,G,H,I)],[E=0]).
eq(f2(A,B,C,D),1,[f0(0,B,C,D,E,F,G,H,I)],[E=1]).
eq(f1(A,B,C,D),1,[f0(-1,B,C,-1,E,F,G,H,I),loop_cont_f0(F,G,H,I)],[E=0,9>=A]).
eq(f1(A,B,C,D),1,[f0(-1,B,C,-1,E,F,G,H,I)],[E=1,9>=A]).
eq(f0(A,B,C,D,E,F,G,H,I),1,[f0(-1+A,B,A,D,E,F,G,H,I)],[9>=A]).
eq(f0(A,B,C,D,E,A,F,C,D),1,[],[E=1,A>=10]).