#include <bits/stdc++.h>
                            #include<iostream>
                            #include<cstdio>
                            #include<vector>
                            #include<queue>
                            #include<map>
                            #include<cstring>
                            #include<string>
                            #include <math.h>
                            #include<algorithm>
                        //    #include <boost/multiprecision/cpp_int.hpp>
                            #include<functional>
                     #define int long long
                            #define inf  1000000007
                            #define pa pair<int,int>
                            #define ll long long
                            #define pal pair<double,int>
                            #define ppa pair<pa,int>
                            #define ssa pair<string,int>
                            #define  mp make_pair
                            #define  pb push_back
                            #define EPS (1e-10)
                            #define equals(a,b) (fabs((a)-(b))<EPS)
                     
                            using namespace std;
                     //priority_queue<int, vector<int>, greater<int> > que;
                            class Point{
                            	public:
                            	double x,y;
                            	Point(double x=0,double y=0):x(x),y(y) {}
                            	Point operator + (Point p) {return Point(x+p.x,y+p.y);}
                            	Point operator - (Point p) {return Point(x-p.x,y-p.y);}
                            	Point operator * (double a) {return Point(x*a,y*a);}
                            	Point operator / (double a) {return Point(x/a,y/a);}
                            	double absv() {return sqrt(norm());}
                            	double norm() {return x*x+y*y;}
                            	bool operator < (const Point &p) const{
                            		return x != p.x ? x<p.x: y<p.y;
                            	}
                            	bool operator == (const Point &p) const{
                            		return fabs(x-p.x)<EPS && fabs(y-p.y)<EPS;
                            	}
                            };
                            typedef Point Vector;
                     
                            struct Segment{
                            Point p1,p2;
                            };
                     
                        double hen(Vector a){
                        if(fabs(a.x)<EPS && a.y>0) return acos(0);
                        else if(fabs(a.x)<EPS && a.y<0) return 3*acos(0);
                        else if(fabs(a.y)<EPS && a.x<0) return 2*acos(0);
                        else if(fabs(a.y)<EPS && a.x>0) return 0.0;
                        else if(a.y>0) return acos(a.x/a.absv());
                        else return 2*acos(0)+acos(-a.x/a.absv());
                     
                        }
                     
                string itos( int i ) {
                ostringstream s ;
                s << i ;
                return s.str() ;
                }
                 
                int gcd(int v,int b){
                	if(v>b) return gcd(b,v);
                	if(v==b) return b;
                	if(b%v==0) return v;
                	return gcd(v,b%v);
                }
                            double dot(Vector a,Vector b){
                            	return a.x*b.x+a.y*b.y;
                            }
                            double cross(Vector a,Vector b){
                            	return a.x*b.y-a.y*b.x;
                            }
                        
                double distans(double x1,double y1,double x2,double y2){
                	double rr=(x1-x2)*(x1-x2)+(y1-y2)*(y1-y2);
                	return sqrt(rr);
                	
                }


                         //----------------kokomade tenpure------------

string it(int y){
	string r=itos(y);
	while(r.length()<15) r +="0";
	return r;
}

signed main(){
int r=0;
	string s;
	cout<<"? 1000000000000"<<endl;
	cin>>s;
	if(s=="Y"){
		int y=9;
		while(1){
			cout<<"? "<<y<<endl;
			cin>>s;
			if(s=="Y"){
				cout<<"! "<<(y+1)/10<<endl;
				break;
			}
			y *=10;
			y +=9;
		}
		return 0;
	}
	
	for(int keta=0;keta<11;keta++){
		
		int ue=r*10+10,sita=r*10+0,me;
		while(ue-sita>1){
			me=(ue+sita)/2;
			cout<<"? "<<it(me)<<endl;
			cin>>s;
			if(s=="Y") ue=me;
			else sita=me;
		}	
		r =sita;
		
		
	}
//	cout<<"d"<<endl;
	r++;
	while(1){
		if(r%10==0) r/=10;
		else{
			break;
		}
	}
	
	int d=r-1;
	
	r=d*10+9;
	while(1){
		cout<<"? "<<r<<endl;
		cin>>s;
		if(s=="N"){
			r=(r+1)/10;
			break;
		}
		r=r*10+9;
	}
	cout<<"! "<<r<<endl;
	
//cout<<ans<<endl;
	return 0;
}




Measured memory_bytes: 664