#include <bits/stdc++.h>
using namespace std;

int n;

const int maxn = 110;

int ans[maxn];

int out(int tim, int idx)
{
    int hourr = tim / 60;
    int minn = tim % 60;
    string hour = to_string(hourr);
    string min = to_string(minn);
    if (hour.size() != 2)
    {
        hour = "0" + hour;
    }
    if (min.size() != 2)
    {
        min = "0" + min;
    }
    cout << "at " << hour << ":" << min << " check " << idx << '\n';
    string stat;
    cin >> stat;
    if (stat == "awake")
    {
        return 0;
    }
    else
        return 1;
}

int stat[maxn][maxn];
int p[maxn];
int flag[maxn];
int l[maxn], r[maxn];
int vis[maxn];
signed main()
{
    cin >> n;
    int tim = 0;
    for (int i = 1; i <= n; i++)
    {
        stat[i][p[i]] = out(tim, i);
        p[i]++;
    }
    for (int j = 1; j <= 19; j++)
    {
        tim += 30;
        for (int i = 1; i <= n; i++)
        {
            if (flag[i])
                continue;
            stat[i][p[i]] = out(tim, i);
            if (stat[i][p[i]] != stat[i][p[i] - 1])
            {
                flag[i] = 1;
                l[i] = 720 + tim - 30 + 1;
                r[i] = 720 + tim;
            }
            p[i]++;
        }
    }
    for (int j = 1; j <= 10; j++)
    {
        tim += 15;
        for (int i = 1; i <= n; i++)
        {
            if (flag[i])
                continue;
            stat[i][p[i]] = out(tim, i);
            if (stat[i][p[i]] != stat[i][p[i] - 1])
            {
                flag[i] = 1;
                l[i] = 720 + tim - 15 + 1;
                r[i] = 720 + tim;
            }
            p[i]++;
        }
    }

    assert(tim == 720);
    for (; tim < 1440; tim++)
    {
        for (int i = 1; i <= n; i++)
        {
            if (vis[i])
                continue;
            if (l[i] <= tim && tim <= r[i])
            {
                stat[i][p[i]] = out(tim, i);
                if (stat[i][p[i]] != stat[i][p[i] - 1])
                {
                    if (stat[i][p[i]])
                        ans[i] = tim;
                    else
                        ans[i] = tim - 720;
                    vis[i] = 1;
                }
                p[i]++;
            }
        }
    }
    for (int i = 1; i <= n; i++)
    {
        if (!vis[i])
        {
            if (stat[i][p[i] - 1] == 0)
                ans[i] = 0;
            else
                ans[i] = 720;
            vis[i] = 1;
        }
    }
    cout << "answer" << '\n';
    for (int i = 1; i <= n; i++)
    {
        int hourr = ans[i] / 60;
        int minn = ans[i] % 60;
        string hour = to_string(hourr);
        string min = to_string(minn);
        if (hour.size() != 2)
        {
            hour = "0" + hour;
        }

        if (min.size() != 2)
        {
            min = "0" + min;
        }
        cout << hour << ":" << min << '\n';
    }
}