functio arity_0() {
   /*this function has arity 0*/ print;
}

functio arity_1(arg1) {
   /*this function has arity 1*/ print;
   arg1 print;
}

functio arity_2(arg1, arg2) {
   /*this function has arity 2*/ print;
   arg1 print;
   arg2 print;
}

functio arity_3(arg1, arg2, arg3) {
   /*this function has arity 3*/ print;
   arg1 print;
   arg2 print;
   arg3 print;
}

owo arity_0();
owo arity_1(/*foo*/);
owo arity_2(/*foo*/, /*bar*/);
owo arity_3(/*foo*/, /*bar*/, /*baz*/);

i1 dim arity_0 * arity_1;
i1(/*second*/);

/*----*/ print;

i2 dim arity_1 * arity_0;
i2(/*first*/);

/*----*/ print;

ifancy dim arity_3 * arity_3;
ifancy(/*left1*/, /*right1*/, /*left2*/, /*right2*/, /*left3*/, /*right3*/);

/*---*/ print;

another dim arity_0 * arity_3;
another(/*right1*/, /*right2*/, /*right3*/);