#include<bits/stdc++.h> using namespace std; #define int long long typedef pair<int,int>pint; typedef vector<int>vint; #define pb push_back #define mp make_pair #define all(v) (v).begin(),(v).end() #define rep(i,n) for(int i=0;i<(n);i++) #define reps(i,f,n) for(int i=(f);i<(n);i++) template<class T,class U>void chmin(T &t,U f){if(t>f)t=f;} template<class T,class U>void chmax(T &t,U f){if(t<f)t=f;} signed main(){ rep(i,1000){ printf("%03d\n",i); fflush(stdout); char s[100]; scanf("%s",&s); if(s[0]=='u')break; } return 0; }