#include<bits/stdc++.h>
const int M=100005;
using namespace std;
typedef long long ll;
ll bit[26][4*M],st[M],en[M];
vector<int>v[M];
int n,m,trm=0;
void upd(int i,int id,int val)
{
while(id<=2*n)
{
bit[i][id]+=val;
id+=id&-id;
}
}
ll qry(int i,int id)
{
ll ans=0;
while(id>0)
{
ans+=bit[i][id];
id-=id&(-id);
}
return ans;
}
void dfs(int u,int p)
{
st[u]=++trm;
for(auto x:v[u])
{
if(x!=p)
dfs(x,u);
}
en[u]=trm;
}
int main()
{
char s[M];
scanf("%d",&n);
for(int i=0;i<n-1;i++)
{
int x,y;
cin>>x>>y;
v[x].push_back(y);
v[y].push_back(x);
}
dfs(1,-1);
scanf("%s",1+s);
for(int i=1;i<=n;i++)
{
int x=s[i]-'a';
upd(x,st[i],1);
}
scanf("%d",&m);
while(m--)
{
int cs,x;
char ch;
scanf("%d",&cs);
if(cs==0)
{
scanf("%d %c",&x,&ch);
upd(s[x]-'a',st[x],-1);
upd(ch-'a',st[x],1);
s[x]=ch;
}
else if(cs==1)
{
int ct=0;
scanf("%d",&x);
for(int i=0;i<26;i++)
{
ll xx=qry(i,en[x])-qry(i,st[x]-1);
if(xx&1) ct++;
}
if(ct==0 || ct==1)
printf("YES\n");
else
printf("NO\n");
}
}
return 0;
}
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audtbfcynchcpkqcvglnlxcnejyehlohitclbhkojtsydiazrnmckqprzpxgclpmfuaibmwkfpkizmhqavumojdpacydonpvjpdkb
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101
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audtbfcynchcpkqcvglnlxcnejyehlohitclbhkojtsydiazrnmckqprzpxgclpmfuaibmwkfpkizmhqavumojdpacydonpvjpdkb
1000
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