UVA Problem ID 739 (Soundex Indexing )

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main
{

    public static void main(String[] args) throws IOException 
    {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String input;
        StringBuffer sb1 = new StringBuffer("");
        for (int i = 0; i <9; i++) {
         sb1.append(" ");
  }
        sb1.append("NAME");
        while(sb1.length()<34)
        {
         sb1.append(" ");
        }
        sb1.append("SOUNDEX CODE");
        
     StringBuffer sb = new StringBuffer("");

        while((input=br.readLine())!=null) 
        {
            if(input.length()>20)
             break;
            int previousvalue=-1;
            for (int i = 0; i <9; i++) {
             sb.append(" ");
      }
            sb.append(input);
            for (int i = 0; i <34-9-input.length(); i++) {
             sb.append(" ");
      }
//            while(sb.length()<34)
//            {
//             sb.append(" ");
//            }
            int length=0;
         char letters[]=input.toCharArray();
         for (int i = 0; i < letters.length; i++) 
         {
          switch (letters[i]) 
          {
           case 'A':
     case 'E':
     case 'I':
     case 'O':
     case 'U':
     case 'Y':
     case 'W':
     case 'H':
     {
      if(i==0)
      {
       sb.append(input.charAt(0));
      }
      previousvalue=-1;
      break;
     }
     case 'B':
     case 'P':
     case 'F':
     case 'V':
     {
      if(i==0)
      {
       sb.append(input.charAt(0));
       previousvalue=1;
      }
      else
      {
       if(previousvalue!=1)
       {
        sb.append(1);
        length++;
       }
       previousvalue=1;
       
      }
      break;
     }
     case 'C':
     case 'S':
     case 'K':
     case 'G':
     case 'J':
     case 'Q':
     case 'X':
     case 'Z':
     {
      if(i==0)
      {
       sb.append(input.charAt(0));
       previousvalue=2;
      }
      else
      {
       if(previousvalue!=2)
       {
        sb.append(2);
        length++;
       }
       previousvalue=2;
      }
      break;
     }
     case 'D':
     case 'T':
     {
      if(i==0)
      {
       sb.append(input.charAt(0));
       previousvalue=3;
      }
      else
      {
       if(previousvalue!=3)
       {
        sb.append(3);
        length++;
       }
       previousvalue=3;
      }
      break;
     }
     case 'L':
     {
      if(i==0)
      {
       sb.append(input.charAt(0));
       previousvalue=4;
      }
      else
      {
       if(previousvalue!=4)
       {
        sb.append(4);
        length++;
       }
       previousvalue=4;    
      }
      break;
     }
     case 'M':
     case 'N':
     {
      if(i==0)
      {
       sb.append(input.charAt(0));
       previousvalue=5;
      }
      else
      {
       if(previousvalue!=5)
       {
        sb.append(5);
        length++;
       }
       previousvalue=5;
      }
      break;
     }
     case 'R':
     {
      if(i==0)
      {
       sb.append(input.charAt(0));
       previousvalue=6;
      }
      else
      {
       if(previousvalue!=6)
       {
        sb.append(6);
        length++;
       }
       previousvalue=6;
      }
      break;
     }
          }          
         }
         if(length<3)
      {
       while(length!=3)
       {
        sb.append(0);
        length++;
       }
      }
         else if(length>3)
       sb=sb.delete(sb.length()-length+3,sb.length());
      sb.append("\n");
        } 
        System.out.println(sb1);
     System.out.print(sb);

        for (int i = 0; i <19; i++) {
   System.out.print(" ");
  }
        System.out.println("END OF OUTPUT");
    }
}