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.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.Queue;
import java.util.Stack;
import java.util.StringTokenizer;
import java.util.TreeMap;

public class Easy {
    static long mod = (long) Math.pow(10, 9) + 7;
    static long[][] memo = new long[65][5];
    
    
    public static void main(String[] args) {
        MyScanner sc = new MyScanner();
        out = new PrintWriter(new BufferedOutputStream(System.out));
        
        int n = sc.nextInt();
        String[] curr = sc.nextLine().split(":");
        int hour = Integer.parseInt(curr[0]);
        int min = Integer.parseInt(curr[1]);
        if (min > 59) {
            min = 10 + min%10;
        }
        if (n == 24) {
            if (hour > 29) {
                hour = 10 + hour % 10;
            } else if (hour > 23) {
                hour = 20;
            }
        } else {
            if (hour > 19) {
                hour = hour % 10;
                if (hour == 0) hour = 10;
            } else if (hour > 12) {
                hour  = 10;
            } else if (hour == 0) hour = 1;
        }
        out.println((hour < 10 ? "0" : "") + hour + ":" + (min < 10 ? "0" : "")  + min);
        out.close();
    }

    
    public static class Node {
        HashMap<Integer, Integer> edges;
        public Node() {
            edges = new HashMap<>();
        }
    }

    public static long[] matPow(int pow) {
        long[] mat = new long[4];
        if (memo[pow][0] != 0) {
            mat[0] = memo[pow][1];
            mat[1] = memo[pow][2];
            mat[2] = memo[pow][3];
            mat[3] = memo[pow][4];
            return mat;
        }

        long[] temp = matPow(pow - 1);
        long[] temp2 = matPow(pow - 1);
        mat[0] = (temp[0]*temp2[0] + temp[1]*temp2[2]) % mod;
        mat[1] = (temp[0]*temp2[1] + temp[1]*temp2[3]) % mod; 
        mat[2] = (temp[2]*temp2[0] + temp[3]*temp2[2]) % mod;
        mat[3] = (temp[2]*temp2[1] + temp[3]*temp2[3]) % mod;
        memo[pow][0] = 1;
        memo[pow][1] = mat[0];
        memo[pow][2] = mat[1];
        memo[pow][3] = mat[2];
        memo[pow][4] = mat[3];
        return mat;
    }

    public static PrintWriter out;
    /*
    int n      = sc.nextInt();        // read input as integer
    long k     = sc.nextLong();       // read input as long
    double d   = sc.nextDouble();     // read input as double
    String str = sc.next();           // read input as String
    String s   = sc.nextLine();       // read whole line as String
    out.println(result);              // print via PrintWriter
     */
    public static class MyScanner {
        BufferedReader br;
        StringTokenizer st;

        public MyScanner() {
            br = new BufferedReader(new InputStreamReader(System.in));
        }

        String next() {
            while (st == null || !st.hasMoreElements()) {
                try {
                    st = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }

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

        long nextLong() {
            return Long.parseLong(next());
        }

        double nextDouble() {
            return Double.parseDouble(next());
        }

        String nextLine(){
            String str = "";
            try {
                str = br.readLine();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return str;
        }

    }
}