#include<iostream>
using namespace std;

#define val(x) ((x) == 'C' ? 1 : ((x) == 'O' ? 2 : ((x) == 'W' ? 3 : 0)))

const int MAXN = 2 * 1e5 + 5;
string s;
int n;
int l, r;
int sum[MAXN];

int main(){
	freopen("operation.in","r",stdin);
	freopen("operation.out","w",stdout);
	cin.tie(0) -> ios::sync_with_stdio(0);
	cin >> s;
	s = ' ' + s;
	for(int i = 1;i < s.size();i ++){
		if(i == 1) sum[i] = val(s[i]);
		else sum[i] = (sum[i - 1] ^ val(s[i]));
	}
	cin >> n;
	while(n --){
		cin >> l >> r;
		if((sum[l - 1] ^ sum[r]) == 1) cout << 'Y';
		else cout << 'N';
	}
	return 0;
}