%prec({a} < {b})%

%prec({a} < {c})%

%prec({b} < {c})%

%left_assoc(a, b, c)%

%right_assoc(d)%

*** Error 3.14,

prec_anno conflict: c < a

a,b

b,c

'a'

*** Error 5.14, identifier has already other associativity 'b'

*** Error 5.16, identifier has already other associativity 'a'

### Hint 5.20, repeated associative identifier 'd'