Scope Error Message

TKTKTK

   Compiling playground v0.0.1 (/playground)
error[E0425]: cannot find value `bravo` in this scope
  --> src/main.rs:10:40
   |
10 |   println!("alfa {} - bravo {}", alfa, bravo);
   |                                        ^^^^^ not found in this scope

For more information about this error, try `rustc --explain E0425`.
error: could not compile `playground` due to previous error