struct Span {
    pub begin: usize,
    pub end: usize,
}

fn main() {
    let text = "the quick brown óf fox óf the end óf the world";
    let textstop = "óf the and of";
    let stopwords: Vec<_> = textstop.split_whitespace().collect();
    let mut spans: Vec<Span> = Vec::new();
    for word in &stopwords {
        let indexes: Vec<_> = text.match_indices(word).collect();
        let size = word.as_bytes().len();
        for (i, _) in &indexes {
            spans.push(Span {
                begin: *i,
                end: (*i + size),
            });
        }
    }

}