http://blog.youkuaiyun.com/qq_33184171/article/details/52496677
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
int main()
{
ll M,N;
while(scanf("%I64d %I64d",&M,&N)!=EOF)
{
if(M/2*(M-M/2)<=N) puts("T");
else puts("F");
}
return 0;
}