domain.fzn

var 1..1: low :: output_var = 1;
var 9..9: up :: output_var = 9;
array [1..3] of var 1..8: x :: output_array([1..3]);
constraint int_eq(x[1], 2);
constraint int_eq(x[2], 8);
constraint int_eq(x[3], 2);
solve satisfy;