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pub const FIRST: u16 = 100; pub const EXTENSION: (u16, [u8; 3]) = (299, *b"299"); pub const LAST: (u16, [u8; 3]) = (599, *b"599"); pub const SHORT: u16 = 99; pub const LONG: u16 = 600; pub const OK_REASON: &str = "OK";