public class test
{
public static void main(String args[])
{
String s = "a[bcd[";
String temp = "]";
int x = s.indexOf("[");
while(x >= 0)
{
s = s.substring(0,x)+temp+s.substring(x+1);
System.out.println(s);
x = s.indexOf("[");
}
System.out.println(s);
}
}