#include<cstdio>
#include<vector>
#include<stack>
using namespace std;
#define N 100010
int n,m,sd,pd,id[N],sum[N],low[N],dfn[N];
bool mark[N];
stack<int>s;
vector<int>grap[N];
void tarjan(int v){
    low[v]=dfn[v]=++pd;
    mark[v]=1;
    s.push(v);
    for(int i=0;i<grap[v].size();i++){
        int w=grap[v][i];
        if(!dfn[w]){
            tarjan(w);
            low[v]=min(low[v],low[w]);
        }
        else if(mark[w]){
            low[v]=min(low[v],dfn[w]);
        }
    }
    int u;
    if(low[v]==dfn[v]){
        sd++;
        do{
            u=s.top();
            s.pop();
            id[u]=sd;
            sum[sd]++;
            mark[u]=0;
        }while(u!=v);
    }
}
int main(){
    freopen("messagew.in","r",stdin);
    freopen("messagew.out","w",stdout);
    scanf("%d%d",&n,&m);
    for(int i=1,x,y;i<=m;i++) scanf("%d%d",&x,&y),grap[x].push_back(y);
    for(int i=1;i<=n;i++) if(!dfn[i]) tarjan(i);
    for(int i=1;i<=n;i++) puts(sum[id[i]]>1?"T":"F");
    return 0;
}