#include <bits/stdc++.h>
#define int long long
#define double long double
using namespace std;
const int N = 107;

string rep;
vector<int> v[10001];

void print(int s)
{
    int x = s / 60, y = s % 60;
    if (x < 10)
        cout << '0';
    cout << x << ':';
    if (y < 10)
        cout << '0';
    cout << y << ' ' << flush;
}

int ask(int s, int id)
{
    cout << "at " << flush;
    print(s);
    cout << "check " << id << endl;
    cin >> rep;
    if (rep == "asleep")
        return 0;
    return 1;
}

signed main()
{
    cin.tie(0), cout.tie(0);
    ios::sync_with_stdio(0);
    int n;
    cin >> n;
    int ans[N] = {}, typ[N] = {}, L[N] = {}, R[N] = {};
    for (int i = 1; i <= n; i++)
        typ[i] = ask(0, i);
    set<int> s;
    int now = 0;
    for (int i = 1; i <= n; i++)
        s.insert(i);
    for (int i = 1; i < 48; i++) {
        now += 48 - i;
        if (now >= 720)
            break;
        vector<int> e;
        for (auto &x : s) {
            int ck = ask(now, x);
            if (ck == typ[x])
                L[x] = now;
            else
                e.push_back(x);
        }
        for (int x : e)
            s.erase(x);
    }
    for (int i = 1; i <= n; i++)
        R[i] = L[i] + 720, v[R[i]].push_back(i);
    for (int i = 720; i <= 1440; i++) {
        if (i == 1440) {
            for (int x : v[i])
                ans[x] = 0;
            break;
        }
        for (auto &x : v[i]) {
            if (ask(i, x) == (typ[x] ^ 1))
                v[i + 1].push_back(x);
            else
                ans[x] = i;
        }
    }
    for (int i = 1; i <= n; i++)
        if (typ[i])
            ans[i] -= 720;
    for (int i = 1; i <= n; i++)
        if (ans[i] < 0)
            ans[i] += 1440;
    cout << "answer" << endl;
    for (int i = 1; i <= n; i++)
        print(ans[i]), cout << endl;
    return 0;
}