Problem: You are given a broken clock. You know, that it is supposed to show time in 12- or 24-hours HH:MM format. In 12-hours format hours change from 1 to 12, while in 24-hours it changes from 0 to 23. In both formats minutes change from 0 to 59.

You are given a time in format HH:MM that is currently displayed on the broken clock. Your goal is to change minimum number of digits in order to make clocks display the correct time in the given format.

For example, if 00:99 is displayed, it is enough to replace the second 9 with 3 in order to get 00:39 that is a correct time in 24-hours format. However, to make 00:99 correct in 12-hours format, one has to change at least two digits. Additionally to the first change one can replace the second 0 with 1 and obtain 01:39.

Input

The first line of the input contains one integer 12 or 24, that denote 12-hours or 24-hours format respectively.

The second line contains the time in format HH:MM, that is currently displayed on the clock. First two characters stand for the hours, while next two show the minutes.

Output

The only line of the output should contain the time in format HH:MM that is a correct time in the given format. It should differ from the original in as few positions as possible. If there are many optimal solutions you can print any of them.

Examples

Input

24
17:30


Output

17:30


Input

12
17:30


Output

07:30


Input

24
99:99


Output

09:09

Solution (in JAVA):

Solution:
import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.io.IOException;
import java.io.InputStream;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 *
 * @author Denis Nedelyaev
 */
public class Main {
    public static void main(String[] args) throws Exception {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        FastScanner in = new FastScanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        TaskA solver = new TaskA(in, out);
        solver.solve(1);
        out.close();
    }

    static class TaskA {
        private final FastScanner in;
        private final PrintWriter out;

        public TaskA(FastScanner in, PrintWriter out) {
            this.in = in;
            this.out = out;
        }

        public void solve(int testNumber) throws IOException {
            int f = in.nextInt();
            char[] time = in.next().toCharArray();

            if (f == 12 && time[0] > '1') {
                time[0] = time[1] == '0' ? '1' : '0';
            }
            if (f == 24 && time[0] > '2') {
                time[0] = '0';
            }

            if (f == 12 && time[0] == '1' && time[1] > '2') {
                time[1] = '1';
            }
            if (f == 12 && time[0] == '0' && time[1] == '0') {
                time[1] = '1';
            }
            if (f == 24 && time[0] == '2' && time[1] > '3') {
                time[1] = '0';
            }

            if (time[3] > '5') {
                time[3] = '0';
            }

            out.println(new String(time));
        }

    }

    static class FastScanner {
        private final static int BUFFER_SIZE = 4096;
        private final InputStream in;
        private final StringBuilder sb = new StringBuilder();
        private byte[] buffer = new byte[BUFFER_SIZE];
        private int pos = 0;
        private int size;

        public FastScanner(InputStream inputStream) throws IOException {
            in = inputStream;
            size = 0;
        }

        public String next() {
            int c = skipWhitespace();
            if (c == -1) {
                return null;
            }

            sb.setLength(0);

            do {
                sb.append((char) c);
                c = read();
            } while (c > ' ');

            return sb.toString();
        }

        public int nextInt() {
            int c = skipWhitespace();

            int sign = -1;
            if (c == '-') {
                sign = 1;
                c = read();
            }

            int ans = 0;

            while (c > ' ') {
                ans *= 10;
                ans -= c - '0';
                c = read();
            }

            return sign * ans;
        }

        private int skipWhitespace() {
            while (true) {
                int c = read();
                if (c > ' ' || c == -1) {
                    return c;
                }
            }
        }

        private int read() {
            if (pos >= size) {
                try {
                    size = in.read(buffer, 0, BUFFER_SIZE);
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
                if (size <= 0) {
                    return -1;
                }
                pos = 0;
            }
            return buffer[pos++];
        }

    }
}