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pub mod converter {}
#[allow(dead_code)]
pub fn convert(text: &str ) -> String {

    let result: String = text.chars()
    .map(|x| match x {
        'l' => 'w',
        'L' => 'W',
        'r' => 'w',
        'R' => 'W',
        _  => x
    }).collect();
    result
}