¿ There is any way to use character sets with like operators ?.

Something like : (costumers starting whth a, b, c, d or f)

select * from costumer where name like '[a-f]%'

I can't find it in Beta Documentation of Interbase 6, ¿ what's such
sintaxis ?.

(I know I can build a query with some clauses separated with or, but I
will prefer to not have to generate dinamic querys).

Thank you in advance and sorry for my deficient english.