#include<bits/stdc++.h>
using namespace std;
int a[10000];
int main(){
	int n,m;cin>>n>>m;
	for(int i=1;i<=m;i++){int x;char c;cin>>x>>c;
		if(c=='M' and !a[x]){cout<<"Yes"<<endl;a[x]++;}else{cout<<"No"<<endl;}
	}
	return 0;
}