#include <iostream>
#include <cstring>
#include <cstdio>

const int N = 110;
int n, l[N], r[N], idl[N], idr[N], nxt[N], ans[N];
char s[N];
bool chk[N], ove[N]; 

int ask (int x, int t) {
	int hour = t / 60;
	int min = t % 60;
	printf("at %02d:%02d check %d\n", hour, min, x);
	fflush(stdout);
	scanf("%s", s);
	return s[1] == 'w' ? 1 : 0; 
}

int main() {
	scanf("%d", &n);
	for (int i = 1; i <= n; i++)
		idl[i] = idr[i] = ask (i, 0), nxt[i] = 46;
	for (int t = 0; t < 1440; t++)
		for (int i = 1; i <= n; i++) {
			if (ove[i]) continue;
			if (!chk[i] && (r[i] + nxt[i] == t || t == 720)) {
				nxt[i]--;
				l[i] = r[i];
				idl[i] = idr[i];
				r[i] = t;
				idr[i] = ask(i, t);
				if (idl[i] != idr[i]) {
					chk[i] = true;
					l[i] += 720;
					r[i] += 720; 
				}
			}
			if (chk[i] && l[i] <= t && t <= r[i]) {
				idr[i] = ask(i, t);
				if (idl[i] == idr[i]) {
					ans[i] = t; ove[i] = true;
					if (idl[i] == 1) ans[i] = (ans[i] + 720) % 1440;
				}
			}
		}
	for (int i = 1; i <= n; i++) 
		if (!ove[i] && idr[i] == 0)
			ans[i] = 720;
	printf("answer\n");
	for (int i = 1; i <= n; i++) {
		int hour = ans[i] / 60;
		int min = ans[i] % 60;
		printf("%02d:%02d\n", hour, min);	
	}
	
	return 0;
}