// Source: https://usaco.guide/general/io

#include <bits/stdc++.h>
using namespace std;
void print(int t) {
    int h = t/60;
    int m = t%60;
    cout<<h/10<<h%10<<":"<<m/10<<m%10;
}

bool is_sleep(int ask_time, int i) {
    cout << "at ";
    print(ask_time);
    cout << " check " << i + 1 << endl;
    string s;
    cin >> s;
    if (s == "asleep") {
        return true;
    } else {
        return false;
    }
}

void solve(){
	const int TIME=1440;
	int n,t=0,block=49;
	cin>>n;
	vector<bool> times(n);
	for(int i=0;i<n;i++){
		times[i]=is_sleep(0,i);
	}
	vector<int> l(n,-1),r(n,-1);
	for(int i=0;i<49;i++){
		int tmp=t;
		t+=block;
		t=min(t,TIME/2);
		for(int j=0;j<n;j++){
			if(l[j]==-1){
				bool fl=is_sleep(t,j);
				if(fl!=times[j]){
					l[j]=tmp+1+TIME/2;
					r[j]=t+TIME/2;
				}
			}
		}
		block--;
	}
	while(true){
		int j=-1;
		for(int i=0;i<n;i++){
			if(l[i]<r[i]){
				if(j==-1||l[i]<l[j])j=i;
			}
		}
		if(j==-1)break;
		//cout <<l[j]<<"\n";
		bool fl=is_sleep(l[j],j);
		if(fl!=times[j]){
			l[j]++;
		}else{
			r[j]=l[j];
		}
	}
	cout<<"answer"<<endl;
	for(int i=0;i<n;i++){
		int tmp;
		if(times[i]){
			tmp=l[i];
		}else{
			tmp=l[i]-TIME/2;
		}
		tmp%=TIME;
		print(tmp);cout<<endl;
	}
}
int main() {
	ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
	cout << setprecision(15) << fixed;
	int t=1;
	//cin>>t;
	while(t--)solve();
}