#include<bits/stdc++.h>
#define int long long
using namespace std;
int32_t main()
{
ios::sync_with_stdio(0);
cin.tie(0);
int t;
cin>>t;
while(t--)
{
int n;
cin>>n;
int a[n];
for(int i=0;i<n;i++)
{
cin>>a[i];
}
string s;
cin>>s;
int red=0,blue=0;
for(int i=0;i<n;i++)
{
if(s[i]=='R')
{
red++;
}
else
{
blue++;
}
}
vector<pair<char,int>>vec(n);
for(int i=0;i<n;i++)
{
vec[i]={s[i],a[i]};
}
bool b=0;
for(int i=0;i<n;i++)
{
if(a[i]>n && s[i]=='R')
{
b=1;
break;
}
else if(a[i]<=0 && s[i]=='B')
{
b=1;
break;
}
}
if(b==1)
{
cout<<"NO"<<'\n';
}
else
{
sort(vec.begin(),vec.end());
for(int j=0;j<blue;j++)
{
if(vec[j].second<j+1)
{
b=1;
break;
}
}
for(int j=blue;j<n;j++)
{
if(vec[j].second>j+1)
{
b=1;
break;
}
}
if(b==0)
{
cout<<"YES"<<'\n';
}
else
{
cout<<"NO"<<'\n';
}
}
}
}
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