#include<bits/stdc++.h>
using namespace std;
#define dl double
int main()
{
	dl a,b,k;
    cin >>a>>b>>k;
    dl a1 = a+b*0.9*1.2;
    dl a2 = a*2 + b *2*1.2*1.2*1.2;
    dl ke = b*5*1.2*1.2*1.2*1.2;
    dl a3 = a*4 + ke+ke*1.2+ke*1.2*1.2+ke*1.2*1.2*1.2;
    dl a4 = 500;
    dl a5 = a1+a2+a3+a4; 
    if(k-a5<=0)cout << "You have slain an enemy";
    else cout << "You have been slain";
    //来自智商129的高级回答^U^
	return 0;
}