#include<bits/stdc++.h>
#define ll long long
using namespace std;
const int N=2e5+10;
int n,qc[N],qo[N],qw[N];
string s,ans;
int main()
{
    freopen("operation.in","r",stdin);
    freopen("operation.out","w",stdout);
    
    cin>>s;
    cin>>n;
    s=" "+s;
    for(int i=1;i<=n;i++){
        qc[i]=qc[i-1],qo[i]=qo[i-1],qw[i]=qw[i-1];
        if(s[i]=='C') qc[i]++;
        if(s[i]=='O') qo[i]++;
        if(s[i]=='W') qw[i]++;
    }
    for(int i=1;i<=n;i++)
    {
        int l,r;
        cin>>l>>r;
        int c=qc[r]-qc[l-1],o=qo[r]-qo[l-1],w=qw[r]-qw[l-1];
        c=c%2,o=o%2,w=w%2;
        if(c==1&&o==0&&w==0) ans+="Y";
        else if(c==0&&o==1&&w==1) ans+="Y";
        else ans+="N"; 
    }
    cout<<ans<<endl;
    return 0; 
}