use std::string::String; 
// This code is editable and runnable!
fn main() {
  // A simple hello world
  let program = "H W f R P";
  let mut msg = String::from_str("");
 
  for token in program.chars() {
    match token {
      'H' => msg.push_str("Hello "),
      'W' => msg.push_str("World, "),
      'f' => msg.push_str("from "),
      'R' => msg.push_str("RJM "),
      'P' => msg.push_str("Programming "),
      _ => { /* ignore everything else */ }
    }
  }
  
  
  println!("{}", msg);
}