#include<iostream>
using namespace std;
int main()
{
	int n,c,d;
	c=d=1;
	cin>>n;
	while(n>9)
	{
		if(n%10>=n/10%10) d=0;
		if(n%10<=n/10%10) c=0;
        n=n/10;		
	}
	if(c==1) cout<<"crescator";
	else if (d==1) cout<<"descrescator";
	     else cout<<"nici";
	return 0;
}