Tattah is asleep if and only if Tattah is attending a lecture. This is a well-known formula among Tattah's colleagues.

On a Wednesday afternoon, Tattah was attending Professor HH's lecture. At 12:21, right before falling asleep, he was staring at the digital watch around Saher's wrist. He noticed that the digits on the clock were the same when read from both directions i.e. a palindrome.

In his sleep, he started dreaming about such rare moments of the day when the time displayed on a digital clock is a palindrome. As soon as he woke up, he felt destined to write a program that finds the next such moment.

However, he still hasn't mastered the skill of programming while sleeping, so your task is to help him.

Input

The first and only line of the input starts with a string with the format "HH:MM" where "HH" is from "00" to "23" and "MM" is from "00" to "59". Both "HH" and "MM" have exactly two digits.

Output

Print the palindromic time of day that comes soonest after the time given in the input. If the input time is palindromic, output the soonest palindromic time after the input time.

Examples

Input

12:21


Output

13:31


Input

23:59


Output

00:00
//package com.prituladima.codeforce.a2oj.div2A;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.StringTokenizer;

import static java.util.stream.IntStream.range;

public class Pro76 {

    private void solve() {

        char[] input = nextToken().toCharArray();

//        plusOneMin(input);


        while (true){
            plusOneMin(input);

//            soutn(Arrays.toString(input));
            if((input[0] == input[4] && input[1] == input[3])){
                break;
            }
        }

        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < input.length; i++) {
            sb.append(input[i]);
        }

        sout(sb.toString());

    }


    void plusOneMin(char[] input){
        if (input[4] + 1 > '9') {
            input[4] = '0';
            if (input[3] + 1 > '5') {
                input[3] = '0';
                int hh = Integer.parseInt(input[0] + "" + input[1]);
                if (hh + 1 > 23) {
                    input[0] = '0';
                    input[1] = '0';
                } else {
                    char[] newHH = String.format("%02d", hh + 1).toCharArray();
                    input[0] = newHH[0];
                    input[1] = newHH[1];
                }
            }else {
                input[3]++;
            }
        } else {
            input[4]++;
        }
    }

    public static void main(String[] args) {
        new Pro76().run();
    }

    private BufferedReader reader;
    private StringTokenizer tokenizer;
    private PrintWriter writer;

    private void run() {
        try {
            reader = new BufferedReader(new InputStreamReader(System.in));
            tokenizer = null;
            writer = new PrintWriter(System.out);
            solve();
            reader.close();
            writer.close();
        } catch (Exception e) {
            e.printStackTrace();
            System.exit(1);
        }
    }

    private int nextInt() {
        return Integer.parseInt(nextToken());
    }

    private long nextLong() {
        return Long.parseLong(nextToken());
    }

    private double nextDouble() {
        return Double.parseDouble(nextToken());
    }

    private int[] nextArr(int size) {
        return Arrays.stream(new int[size]).map(c -> nextInt()).toArray();
    }

    private long[] nextArrL(int size) {
        return Arrays.stream(new long[size]).map(c -> nextLong()).toArray();
    }

    private double[] nextArrD(int size) {
        return Arrays.stream(new double[size]).map(c -> nextDouble()).toArray();
    }

    private char[][] nextCharMatrix(int n) {
        return range(0, n).mapToObj(i -> nextToken().toCharArray()).toArray(char[][]::new);
    }

    private int[][] nextIntMatrix(int n, int m) {
        return range(0, n).mapToObj(i -> nextArr(m)).toArray(int[][]::new);
    }

    private double[][] nextDoubleMatrix(int n, int m) {
        return range(0, n).mapToObj(i -> nextArr(m)).toArray(double[][]::new);
    }

    private String nextToken() {
        while (tokenizer == null || !tokenizer.hasMoreTokens()) {
            try {
                tokenizer = new StringTokenizer(reader.readLine());
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
        }
        return tokenizer.nextToken();
    }

    private void soutn() {
        writer.println();
    }

    private void soutn(Object o) {
        writer.println(o);
    }

    private void sout(Object o) {
        writer.print(o);
    }

    private void souf(String format, Object... args) {
        writer.printf(format, args);
    }

    private <Param> void sout(Param[] arr) {
        writer.println(Arrays.toString(arr));
    }
}
