#include<cstdio>
#include<cstring>
#define N 200005
using namespace std;
int n,m,a[N],x,y,z[256];char c[N];
int read(){
	int sum=0;bool f=0;char c=getchar();
	for(;c<48||c>57;c=getchar())if(c==45)f=1;
	for(;c>=48&&c<=57;c=getchar())sum=sum*10+(c&15);
	return f?-sum:sum;
}
int main(){
	freopen("operation.in","r",stdin);freopen("operation.out","w",stdout);
	z['C']=1;z['O']=2;z['W']=3;
	scanf("%s",c+1);n=strlen(c+1);
	for(int i=1;i<=n;i++)a[i]=a[i-1]^z[c[i]];
	m=read();
	while(m--)
	{
		x=read(),y=read();
		printf("%c",a[y]^a[x-1]^1?'N':'Y');
	}
	return 0;
}