#include<bits/stdc++.h>
#define pii pair<int,bool>
#define fi first
#define se second
using namespace std;
const int N=105;

int n,ans[N],jmp[N];
bool vs[N];
bool bk[N];
vector<int> a[2005];
pii b[N];

bool ask(int tim,int id){
	int h=tim/60,m=tim%60;
	cout<< "at ";
	if(h<10) cout<<0;
	cout<<h<<':';
	if(m<10) cout<<0;
	cout<<m<<" check "<<id<<endl;
	string tt;cin>>tt;
	return tt[1]=='s';
}
bool vis[N];
signed main(){
	ios::sync_with_stdio(0),cin.tie(0),cout.tie(0);
	cin>>n;
	for(int i=1;i<=n;++i) a[0].push_back(i),jmp[i]=47,b[i]={-1,0};
	for(int t=0;t<1440;++t){
		for(int id:a[t]){
			if(bk[id]) continue;
			bool o=ask(t,id);
			if(!t)vis[id]=o;
			if(!vs[id]){
				if(b[id].fi!=-1 && o!=b[id].se){
					vs[id]=1;
					for(int j=b[id].fi+720;j<=min(t+720,1439);++j){
						a[j].push_back(id);
					}
				}else{
					if(t+jmp[id]>=1440) a[1439].push_back(id);
					else a[t+jmp[id]].push_back(id),--jmp[id];
				}
				b[id]={t,o};
			}else{
				if(o!=b[id].se) ans[id]=(o?t:t-720),bk[id]=1;
			}
		}
		a[t].clear();
	}
	cout<<"answer"<<endl;
	for(int i=1;i<=n;++i){
		if(!ans[i]&&!vis[i])ans[i]=720;
		int h=ans[i]/60,m=ans[i]%60;
		if(h<10) cout<<0;
		cout<<h<<':';
		if(m<10) cout<<0;
		cout<<m<<endl;
	}
}