#include<bits/stdc++.h>
using namespace std;
const int N=110;
int n;
inline string tts(int t){
    int h=t/60,m=t%60;
    string s;
    s+='0'+h/10;
    s+='0'+h%10;
    s+=':';
    s+='0'+m/10;
    s+='0'+m%10;
    return s;
}
inline bool query(int t,int id){
    cout<<"at "<<tts(t)<<" check "<<id<<endl;
    string s;
    cin>>s;
    return s=="awake";
}int a[N],cur[N],phase[N],step[N],ans[N];//绗?0$鍒嗙殑鏃跺€欑殑鐘舵€侊紝杩欎竴娆¤闂殑鏃堕棿锛屽睘浜庨偅涓樁娈碉紝杩欎竴娆′粠涓婁竴涓綅缃鍔犲灏?
signed main(){
    cin>>n;
    for(int i=1;i<=n;i++)a[i]=query(0,i);
    for(int i=1;i<=n;i++)phase[i]=0,cur[i]=step[i]=48;
    cur[0]=0x3f3f3f3f;
    while(1){
        int id=0;
        for(int i=1;i<=n;i++){
            if(cur[i]<cur[id])id=i;
        }
        if(cur[id]==1440)break;
        int res=query(cur[id],id);
        if(res==(a[id]^phase[id])){
            if(step[id]>1)step[id]--;
            cur[id]+=step[id];
        }else{
            if(phase[id]==0){
                cur[id]=cur[id]-step[id]+1+720;
                step[id]=1;
                phase[id]=1;
            }else{
                ans[id]=cur[id];
                cur[id]=1440;
            }
        }
    }    
    cout<<"answer"<<endl;
    for(int i=1;i<=n;i++){
        if(!a[i])cout<<tts(ans[i])<<endl;
        else cout<<tts((ans[i]+720)%1440)<<endl;
    }
    return 0;
}