pub trait StringManipulation {
    fn removechar(&self, index: usize) -> String;
    fn substring(&self, start: usize, end: usize) -> String;
    fn get_length(&self) -> usize;
    fn get_index(&self, index: usize) -> char;
    fn indexes_of(&self, character: char) -> Vec<i32>;
    fn index_of(&self, character: char) -> usize;
}
impl StringManipulation for String {
    fn removechar(&self, index: usize) -> String {
        let str2: String = format!("{}{}", self.substring(0, index - 1), self.substring(index + 1, self.get_length()));
        str2
    }
    fn index_of(&self, character: char) -> usize {
        let chars: Vec<char> = self.chars().collect();
        chars.iter().position(|&find| find == character).unwrap()
    }
    fn indexes_of(&self, character: char) -> Vec<i32> {
        let mut v: i32 = 0;
        let mut vector: Vec<i32> = Vec::new();
        for c in self.chars() {
            if character == c {
                vector.push(v);
            };
            v = v + 1;
        };
        vector
    }
    fn get_index(&self, index: usize) -> char {
        let chars: Vec<char> = self.chars().collect();
        chars[index]
    }
    fn get_length(&self) -> usize {
        let chars: Vec<char> = self.chars().collect();
        chars.len()
    }
    fn substring(&self, start: usize, end: usize) -> String {
        let mut str2: String = String::from("");
        let chars: Vec<char> = self.chars().collect();
        for c in start..end {
            str2.push(chars[c]);
        }
        str2
    }
}