#include<iostream>

using namespace std;

int main()
{
	unsigned int s, d;
	while(cin>>s>>d)
	{
		if (d > 4*s && d < 5*s)
		{
			cout<<10*s - 2*d<<endl;
		}
		else if (2*d > 3*s && 2*d < 4*s)
		{
			cout<<8*s - 4*d<<endl;
		}
		else if (3*d > 2*s && 3*d < 3*s)
		{
			cout<<6*s - 6*d<<endl;
		}
		else if (12*d > 3*s && 12*d < 4*s)
		{
			cout<<3*s - 9*s<<endl;
		}
		else
		{
			cout<<"Deficit"<<endl;
		}
	}
	return 0;
}