#define LL long long
#define SZ(x) ((int)(x).size())
#define ALL(x) (x).begin(),(x).end()
#define REP(i,n) for(int i=0;i<n;i++)
#define FOR(i,a,b) for(int i=a;i<=b;i++)
#define REV(i,n) for(int i=n-1;i>=0;i--)
#define pri(a) cout << a << endl;
#define prii(a,b) cout << a << " " << b << endl;
using namespace std;
int main()
{
int n,T,cs=0;
char ch;
cin>>T;
while(T--)
{
printf("Case %d: ",++cs);
cin>>n;
int ls=0, res, fl=0;
REP(i,n)
{
cin>>ch;
if(ch=='D') ls++;
else if(ch=='L') ls++;
else ls=0;
if(ls>=3 and !fl) {fl=1,res = i+1;}
}
if(!fl) puts("Yay! Mighty Rafa persists!");
else pri(res);
}
return 0;
}
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