Time Conversion

 import java.io.*;

import java.math.*;

import java.security.*;

import java.text.*;

import java.util.*;

public class Solution

{

    public static void main(String args[])

    {

        Scanner sc=new Scanner(System.in);

        int a=0,p=0,w;

        String str=sc.nextLine();

        char ch[]=new char[str.length()];

        for(int i=0;i<str.length();i++)

        {

            ch[i]=str.charAt(i);

        }

        if(ch[8]=='a'||ch[8]=='A')

        a=1;

        if(ch[8]=='p'||ch[8]=='P')

        p=1;

        if(a==1)

        {

            if(ch[0]=='1'&&ch[1]=='2')

            {

                ch[0]='0';

                ch[1]='0';

            }

        }

        if(p==1)

        {

           if(ch[0]=='1'&&ch[1]=='2')

            {

               ch[0]='1';

               ch[1]='2';

            } 

            if(ch[0]=='0'&&ch[1]=='1')

            {

                ch[0]='1';

                ch[1]='3';

            } 

             if(ch[0]=='0'&&ch[1]=='2')

            {

                ch[0]='1';

                ch[1]='4';

            } 

             if(ch[0]=='0'&&ch[1]=='3')

            {

                ch[0]='1';

                ch[1]='5';

            } 

             if(ch[0]=='0'&&ch[1]=='4')

            {

                ch[0]='1';

                ch[1]='6';

            } 

             if(ch[0]=='0'&&ch[1]=='5')

            {

                ch[0]='1';

                ch[1]='7';

            } 

             if(ch[0]=='0'&&ch[1]=='6')

            {

                ch[0]='1';

                ch[1]='8';

            } 

             if(ch[0]=='0'&&ch[1]=='7')

            {

                ch[0]='1';

                ch[1]='9';

            } 

             if(ch[0]=='0'&&ch[1]=='8')

            {

                ch[0]='2';

                ch[1]='0';

            } 

             if(ch[0]=='0'&&ch[1]=='9')

            {

                ch[0]='2';

                ch[1]='1';

            } 

            if(ch[0]=='1'&&ch[1]=='0'||ch[1]=='1')

            {

                ch[0]='2';

                if(ch[1]=='0')

                {

                  ch[1]='2';  

                }

                else if(ch[1]=='1')

                {

                    ch[1]='3';

                }

            }

        }

        for(int l=0;l<(str.length()-2);l++)

        {

            System.out.print(ch[l]);

        }

    }

}