#include <bits/stdc++.h>
#define st first
#define nd second
using lint = long long;
constexpr int mod = 998244353;
constexpr int inf = 0x3f3f3f3f;
constexpr lint linf = 0x3f3f3f3f3f3f3f3f;
using namespace std;

string query(int t, int id){
    int x = t / 60, y = t % 60;
    cout<<"at ";
    if(x < 10) cout<<0;
    cout<<x<<":";
    if(y < 10) cout<<0;
    cout<<y<<" check "<<id+1<<endl;
    string s;
    cin>>s;
    return s;
}

int main(){
    cin.tie(nullptr)->sync_with_stdio(false);
    int n;
    cin>>n;
    vector<int>be(n);
    for(int i=0;i<n;i++){
        string s = query(0, i);
        if(s == "awake") be[i] = 1;
    }
    vector<bool>w(n);
    vector<vector<int>>ind(50);
    vector<int>v(50, -1), ans(n);
    for(int i=1,j=0;i<50;i++){
        v[i-1] = j;
        int k = j + (50 - i);
        for(int x=0;x<n;x++){
            if(w[x]) continue;
            if(k >= 720){
                ind[i-1].push_back(x);
                w[x] = 1;
                ans[x] = 0;
                continue;
            }
            string s = query(k, x);
            int c = 0;
            if(s == "awake") c = 1;
            if(c != be[x]){
                ind[i-1].push_back(x);
                w[x] = 1;
                ans[x] = k + 720;
            }
        }
        if(k >= 720) break;
        j = k;
    }
    for(int x=0;x<n;x++) w[x] = 0;
    for(int i=0;i<50;i++){
        if(v[i] == -1) break;
        int sz = 50 - i - 2;
        for(int j=1;j<=sz;j++){
            int k = v[i] + j + 720;
            if(k == 1440) break;
            for(int x : ind[i]){
                if(w[x]) continue;
                string s = query(k, x);
                int c = 0;
                if(s == "awake") c = 1;
                if(c == be[x]){
                    w[x] = 1;
                    ans[x] = k;
                }
            }
        }
    }
    cout<<"answer"<<endl;
    for(int i=0;i<n;i++){
        if(be[i]) ans[i] = (ans[i] + 720) % 1440;
        int t = ans[i];
        int x = t / 60, y = t % 60;
        if(x < 10) cout<<0;
        cout<<x<<":";
        if(y < 10) cout<<0;
        cout<<y<<endl;
    }
    return 0;
}