decoding

import java.io.*;
class Hki
{
public void main()throws IOException
{
BufferedReader br=new BufferedReader(new InputStreamReader (System.in));
System.out.println("enter the code");
String s=br.readLine();
int l=s.length();
int n=0;

String g="",y="";
for(int i=l-1;i>=0;i--)
{
g=g+s.charAt(i);
}
for(int j=0;j<l;j++)
{
int ch =(int)g.charAt(j);
ch=ch-48;
n=n*10+ch;
if((n>=65&&n<=90)||n==32||(n>=97&&n<=122))

{
y=y+(char)n;
}
else continue;
}
System.out.println("y="+y);
}
}
only frst letr is printng