#include<bits/stdc++.h>
using namespace std;
const int N=1450;

string get_string(int t){
    int hour=t/60;
    int minute=t%60;
    string ret;
    ret+='0'+hour/10;
    ret+='0'+hour%10;
    ret+=':';
    ret+='0'+minute/10;
    ret+='0'+minute%10;
    return ret;
}

int ask(int t,int i){
    cout<<"at "<<get_string(t)<<" check "<<i+1<<endl;
    string s;
    cin>>s;
    return s=="asleep";
}

int main(){
    int n;
    cin>>n;

    vector<int>a(n);
    for(int i=0;i<n;i++)a[i]=ask(0,i);

    vector<int>pos(n,48),step(n,48),v(n),ans(n);
    while(1){
        int i=min_element(pos.begin(),pos.end())-pos.begin();
        if(pos[i]==1440)break;
        int tmp=ask(pos[i],i);
        if(tmp!=(a[i]^v[i])){
            if(v[i]==0){
                pos[i]=pos[i]-step[i]+1+720;
                step[i]=1;
                v[i]=1;
            }else{
                ans[i]=pos[i];
                pos[i]=1440;
            }
        }else{
            if(step[i]>1)step[i]--;
            pos[i]+=step[i];
        }
    }
    puts("answer");
    for(int i=0;i<n;i++){
        if(a[i]==0)ans[i]=(ans[i]+720)%1440;
        cout<<get_string(ans[i])<<endl;
    }
    return 0;
}