{"raw_statement":[{"iden":"problem statement","content":"Takahashi has a strong stomach. He never gets a stomachache from eating something whose \"best-by\" date is at most $X$ days earlier. He gets a stomachache if the \"best-by\" date of the food is $X+1$ or more days earlier, though.\nOther than that, he finds the food delicious if he eats it not later than the \"best-by\" date. Otherwise, he does not find it delicious.\nTakahashi bought some food $A$ days before the \"best-by\" date, and ate it $B$ days after he bought it.\nWrite a program that outputs `delicious` if he found it delicious, `safe` if he did not found it delicious but did not get a stomachache either, and `dangerous` if he got a stomachache."},{"iden":"constraints","content":"*   $1 ≤ X,A,B ≤ 10^9$"},{"iden":"input","content":"Input is given from Standard Input in the following format:\n\n$X$ $A$ $B$"},{"iden":"sample input 1","content":"4 3 6"},{"iden":"sample output 1","content":"safe\n\nHe ate the food three days after the \"best-by\" date. It was not delicious or harmful for him."},{"iden":"sample input 2","content":"6 5 1"},{"iden":"sample output 2","content":"delicious\n\nHe ate the food by the \"best-by\" date. It was delicious for him."},{"iden":"sample input 3","content":"3 7 12"},{"iden":"sample output 3","content":"dangerous\n\nHe ate the food five days after the \"best-by\" date. It was harmful for him."}],"translated_statement":null,"sample_group":[],"show_order":["default"],"formal_statement":null,"simple_statement":null,"has_page_source":true}