UVA - 445 - Marvelous Mazes

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));
        StringBuffer sb = new StringBuffer("");
        String m = "";
        while((m=br.readLine())!=null){
            if(m.trim().equals("")){
               sb.append("\n");
               continue;
            }   
            int ind=0;
           for(int i=0;i<m.length();i++){
               if(m.charAt(i)>='0' && m.charAt(i)<='9'){
                   ind+=m.charAt(i)-48;
                   if(i<m.length()-1){
                       if(m.charAt(i+1)>='0' && m.charAt(i+1)<='9'){
                         continue;
                       }
                   }
                   i++;
                   if(m.charAt(i)=='b'){
                      for(int j=0;j<ind;j++){
                        sb.append(' ');
                      }
                   }else{
                       for(int j=0;j<ind;j++){
                           sb.append(m.charAt(i));
                       } 
                   }
                   ind=0;
               }
               if(m.charAt(i)=='!'){
                   sb.append("\n");
               }
           }
           sb.append("\n");
        }
        System.out.print(sb);
    }
}