#include <bits/stdc++.h>
using namespace std;
#define int long long
int32_t main(){
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
int N,K;
cin >> N >> K;
vector<int> depth(N+1);
vector lift(N+1,vector(17,0ll));
vector<int> maxup(N+1);
vector<int> maxdown(N+1);
vector<int> pEdge(N+1);
vector<tuple<int,int,int>> queries;
vector<vector<pair<int,int>>> adj(N+1);
{
int tim = 0;
for(int i=1;i<=N-1+K;i++){
char t;cin>>t;
if(t=='S'){
int a,b;
cin >> a >> b;
tim++;
adj[a].emplace_back(b,tim);
adj[b].emplace_back(a,tim);
} else if(t=='Q'){
int a,d;
cin >> a >> d;
queries.emplace_back(tim,a,d);
} else {
int d;
cin >> d;
queries.emplace_back(tim,-1,d);
}
}
}
{
function<void(int,int)> dfs = [&](int x,int p){
lift[x][0]=p;
depth[x]=depth[p]+1;
maxup[x]=depth[x]-1;
if(pEdge[p]>pEdge[x])maxup[x]=maxup[p];
maxdown[x]=depth[x]-1;
if(pEdge[p]<pEdge[x])maxdown[x]=maxdown[p];
for(auto&[i,cost]:adj[x])if(i!=p){
pEdge[i]=cost;
dfs(i,x);
}
};
dfs(1,0);
for(int bit=1;bit<17;bit++){
for(int i=1;i<=N;i++){
lift[i][bit]=lift[lift[i][bit-1]][bit-1];
}
}
}
auto lcas = [&](int a,int b){
if(depth[b]<depth[a])swap(a,b);
int target = depth[b]-depth[a];
for(int bit=0;bit<17;bit++)if(target&(1<<bit))b=lift[b][bit];
if(a==b)return a;
for(int bit=16;bit>=0;bit--)if(lift[a][bit]!=lift[b][bit]){
a = lift[a][bit];
b = lift[b][bit];
}
return lift[a][0];
};
for(auto&[tim,a,b]:queries){
if(a==-1){
// Count how many servers have b
} else {
int lca = lcas(a,b);
swap(a,b);
int aRaised = a;
int target = max(0ll,depth[a]-depth[lca]-1);
for(int bit=0;bit<17;bit++)if(target&(1<<bit))aRaised=lift[aRaised][bit];
int bRaised = b;
target = max(0ll,depth[b]-depth[lca]-1);
for(int bit=0;bit<17;bit++)if(target&(1<<bit))bRaised=lift[bRaised][bit];
if(depth[lca]<maxup[a]){
cout << "no\n";
continue;
}
if(depth[lca]<maxdown[b]){
cout << "no\n";
continue;
}
if(depth[lca]!=depth[b] and depth[lca]!=depth[a] and pEdge[bRaised]<pEdge[aRaised]){
cout << "no\n";
continue;
}
if(depth[lca]!=depth[b]){
if(pEdge[b]>tim){
cout << "no\n";
}else{
cout << "yes\n";
}
continue;
}
if(depth[lca]==depth[b] and depth[lca]!=depth[a]){
if(pEdge[aRaised]>tim){
cout << "no\n";
}else{
cout << "yes\n";
}
continue;
}
cout << "yes\n";
}
}
}
