#include <iostream>
#include <cstdio>
using namespace std;
const int N=2e5+5;
int s[N][3];
int w(char c){
	if(c=='C') return 0;
	if(c=='O') return 1;
	if(c=='W') return 2;
	return 0;
}
int main(){
	freopen("operation.in","r",stdin);
	freopen("operation.out","w",stdout);
	string str;
	cin>>str;
	int n=str.size();
	str=" "+str;
	for(int i=1;i<=n;i++){
		for(int j=0;j<=2;j++){
			s[i][j]=s[i-1][j];
		}
		s[i][w(str[i])]++;
	}
	int q;
	cin>>q;
	while(q--){
		int l,r;
		cin>>l>>r;
		int c=s[r][0]-s[l-1][0];c%=2;
		int o=s[r][1]-s[l-1][1];o%=2;
		int w=s[r][2]-s[l-1][2];w%=2;
		if(!c&&!o&&!w) cout<<"N";
		if(c&&!o&&!w) cout<<"Y";
		if(!c&&o&&!w) cout<<"N";
		if(!c&&!o&&w) cout<<"N";
		if(c&&o&&!w) cout<<"N";
		if(c&&!o&&w) cout<<"N";
		if(!c&&o&&w) cout<<"Y";
		if(c&&o&&w) cout<<"N";
	}
}