#include <iostream>
using namespace std;
int main() {
ios_base::sync_with_stdio(false);
cin.tie(NULL);
double v, d, s;
char w;
if (cin >> v >> d >> s >> w) {
if (w == 'W') {
v *= 0.64;
} else if (w == 'F') {
d *= 0.82;
}
double thoigian = d / v;
if (thoigian <= s + 1e-9) {
cout << "NAM ANH DA BI HA GUc\n";
} else {
cout << "NAM ANH CHUA BI Ha GUC\n";
}
}
return 0;
}
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