Having the table with the following metadata:

ratings

$($posted TIMESTAMP,

cust$\_$id INT,

prod$\_$id INT,

rating TINYINT,

message STRING$)$

Write a HiveQL query to find the five most common trigrams $($three$-$word

combinations$)$ using ngrams function in the comments for the prod$\_$id $=4756.$ Products$$ comments are in the $$message$$ field of table ratings