warning: variable `L` should have a snake case name
 --> /w/foo.rs:7:21
  |
7 |     if let [x,y,m,n,L] = numbers[..5]{
  |                     ^ help: convert the identifier to snake case: `l`
  |
  = note: `#[warn(non_snake_case)]` on by default

warning: variable `L` should have a snake case name
  --> /w/foo.rs:18:49
   |
18 | fn calc(mut x:u64,mut y:u64,mut m:u64,mut n:u64,L:u64)->String{
   |                                                 ^ help: convert the identifier to snake case: `l`

warning: 2 warnings emitted

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