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

const int N=105;
int n;
bool x[N];int as[N];

inline bool Q(int t,int p){
	printf("at %.2d:%.2d check %d\n",t/60,t%60,p);fflush(stdout);
	char s[10];scanf("%s",s);return s[1]=='w';
}
vector<tuple<bool,int,int>>v[1445];
#define eb emplace_back
int main(){
	scanf("%d",&n);
	for(int i=1;i<=n;i++){x[i]=Q(0,i);v[49].eb(0,i,49);}
	for(int t=0;t<1440;t++)for(auto[o,i,j]:v[t])
		if(!j)as[i]=t;
		else if(!o){
			int y=Q(t,i);
			if(y^x[i])v[t+720-j+1].eb(1,i,j-1);
			else v[t+j-1].eb(0,i,j-1);
		}else{
			int y=Q(t,i);
			if(y^x[i])v[t+1].eb(1,i,j-1);
			else as[i]=t;
		}
	puts("answer");
	for(int i=1;i<=n;i++){
		x[i]&&(as[i]=(as[i]+720)%1440);
		printf("%.2d:%.2d\n",as[i]/60,as[i]%60);
	}
	return 0;
}