import java.io.*;
import java.util.*;

public class C implements Runnable {
	String[] digits = new String[10];
	String EMPTY = ".......";
	{
		digits[0] = "---.---";
		digits[1] = "..-..-.";
		digits[2] = "-.---.-";
		digits[3] = "-.--.--";
		digits[4] = ".---.-.";
		digits[5] = "--.-.--";
		digits[6] = "--.----";
		digits[7] = "-.-..-.";
		digits[8] = "-------";
		digits[9] = "----.--";
	}

	private String getTime(int time) {
		int hours = time / 60;
		int minutes = time % 60;
		String res = "";
		if (hours < 10) {
			res = EMPTY + digits[hours % 10];
		} else {
			res = digits[hours / 10] + digits[hours % 10];
		}
		res += digits[minutes / 10] + digits[minutes % 10];
		return res;
	}

	private void solution() throws IOException {
		while (true) {
			int n = in.nextInt();
			if (n == 0) {
				break;
			}
			String[] times = new String[n];
			int[] min = new int[n - 1];
			int[] max = new int[n - 1];
			for (int i = 0; i < n; ++i) {
				times[i] = readTime();
				if (i + 1 < n) {
					min[i] = in.nextInt();
					max[i] = in.nextInt();
				}
			}
			boolean[][] from = new boolean[n][24 * 60];
			boolean[][] to = new boolean[n][24 * 60];
			for (int time = 0; time < 24 * 60; ++time) {
				if (match(getTime(time), times[0])) {
					from[0][time] = true;
				}
			}
			int MOD = 24 * 60;
			for (int i = 0; i < n - 1; ++i) {
				for (int time = 0; time < from[i].length; ++time) {
					if (from[i][time]) {
						for (int dx = min[i]; dx <= max[i]; ++dx) {
							String nextTime = getTime((time + dx) % MOD);
							if (match(nextTime, times[i + 1])) {
								from[i + 1][(time + dx) % MOD] = true;
							}
						}
					}
				}
			}
			for (int time = 0; time < 24 * 60; ++time) {
				if (match(getTime(time), times[n - 1])) {
					to[n - 1][time] = true;
				}
			}
			for (int i = n - 1; i > 0; --i) {
				for (int time = 0; time < to[i].length; ++time) {
					if (to[i][time]) {
						for (int dx = min[i - 1]; dx <= max[i - 1]; ++dx) {
							String nextTime = getTime((time - dx + MOD) % MOD);
							if (match(nextTime, times[i - 1])) {
								to[i - 1][(time - dx + MOD) % MOD] = true;
							}
						}
					}
				}
			}
			for (int i = 0; i < n; ++i) {
				int count = 0;
				int when = 0;
				for (int j = 0; j < from[i].length; ++j) {
					if (from[i][j] && to[i][j]) {
						++count;
						when = j;
					}
				}
				if (count > 1) {
					out.println("ambiguous, " + count + " possibilities");
				} else {
					out.println(getTimeAsString(when));
				}
			}
			out.println();
		}
	}

	private String getTimeAsString(int time) {
		int hours = time / 60;
		int minutes = time % 60;
		return hours + ":" + String.format("%02d", minutes);
	}

	private boolean match(String time, String pattern) {
		if (pattern.length() != time.length()) {
			throw null;
		}
		for (int i = 0; i < pattern.length(); ++i) {
			if (pattern.charAt(i) != '?') {
				char c = pattern.charAt(i);
				if (c == '|') {
					c = '-';
				}
				if (c != time.charAt(i)) {
					return false;
				}
			}
		}
		return true;
	}

	private String readTime() throws IOException {
		StringBuilder builder = new StringBuilder();
		for (int i = 0; i < 28; ++i) {
			builder.append(in.next());
		}
		char[] s = builder.toString().toCharArray();
		int[] order = new int[]{1, 5, 6, 13, 17, 18, 25, 2, 7, 8, 14, 19, 20, 26, 3, 9, 10, 15, 21, 22, 27, 4, 11, 12, 16, 23, 24, 28};
		builder = new StringBuilder();
		for (int x : order) {
			builder.append(s[x - 1]);
		}
		return builder.toString();
	}

	public void run() {
		try {
			solution();
			in.reader.close();
			out.close();
		} catch (IOException e) {
			e.printStackTrace();
			System.exit(1);
		}
	}

	public static void main(String[] args) {
		new Thread(null, new C(), "", 1 << 28).start();
	}

	private class Scanner {
		BufferedReader reader;
		StringTokenizer tokenizer;

		public Scanner(Reader reader) {
			this.reader = new BufferedReader(reader);
			this.tokenizer = new StringTokenizer("");
		}

		public boolean hasNext() throws IOException {
			while (!tokenizer.hasMoreTokens()) {
				String line = reader.readLine();
				if (line == null) {
					return false;
				}
				tokenizer = new StringTokenizer(line);
			}
			return true;
		}

		public String next() throws IOException {
			hasNext();
			return tokenizer.nextToken();
		}

		public int nextInt() throws IOException  {
			return Integer.parseInt(next());
		}
	}

	Scanner in = new Scanner(new InputStreamReader(System.in));
	PrintWriter out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(System.out)));
}