Useless variable.
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@ -39,7 +39,7 @@ pub fn solve_part2(file_path: &str) -> i32 {
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.step_by(3)
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.collect::<Vec<&str>>()
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.iter()
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.map(|item| {
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.map(|_item| {
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let common_letter = {
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let first = &iter
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.next()
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