Score : $100$ points
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.
Other 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.
Takahashi bought some food $A$ days before the "best-by" date, and ate it $B$ days after he bought it.
Write 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.
Input is given from Standard Input in the following format:
$X$ $A$ $B$
Print delicious if Takahashi found the food delicious; print safe if he neither found it delicious nor got a stomachache; print dangerous if he got a stomachache.
4 3 6
safe
He ate the food three days after the "best-by" date. It was not delicious or harmful for him.
6 5 1
delicious
He ate the food by the "best-by" date. It was delicious for him.
3 7 12
dangerous
He ate the food five days after the "best-by" date. It was harmful for him.