/// Rustで競技プログラミングの入力をスッキリ記述するマクロ
///
/// https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8
macro_rules! input {
    (source = $s:expr, $($r:tt)*) => {
        let mut iter = $s.split_whitespace();
        let mut next = || { iter.next().unwrap() };
        input_inner!{next, $($r)*}
    };
    ($($r:tt)*) => {
        let stdin = std::io::stdin();
        let mut bytes = std::io::Read::bytes(std::io::BufReader::new(stdin.lock()));
        let mut next = move || -> String{
            bytes
                .by_ref()
                .map(|r|r.unwrap() as char)
                .skip_while(|c|c.is_whitespace())
                .take_while(|c|!c.is_whitespace())
                .collect()
        };
        input_inner!{next, $($r)*}
    };
}

macro_rules! input_inner {
    ($next:expr) => {};
    ($next:expr, ) => {};

    ($next:expr, $var:ident : $t:tt $($r:tt)*) => {
        let $var = read_value!($next, $t);
        input_inner!{$next $($r)*}
    };
}

macro_rules! read_value {
    ($next:expr, ( $($t:tt),* )) => {
        ( $(read_value!($next, $t)),* )
    };

    ($next:expr, [ $t:tt ; $len:expr ]) => {
        (0..$len).map(|_| read_value!($next, $t)).collect::<Vec<_>>()
    };

    ($next:expr, chars) => {
        read_value!($next, String).chars().collect::<Vec<char>>()
    };

    ($next:expr, usize1) => {
        read_value!($next, usize) - 1
    };

    ($next:expr, $t:ty) => {
        $next().parse::<$t>().expect("Parse error")
    };
}

macro_rules! eprint(
    ($($arg:tt)*) => {
        if cfg!(feature = "debug") {
            use std::io::Write;
            let r = write!(&mut ::std::io::stderr(), $($arg)*);
            r.expect("failed printing to stderr");
        }
    }
);

macro_rules! eprintln(
    ($($arg:tt)*) => {
        if cfg!(feature = "debug") {
            use std::io::Write;
            let r = writeln!(&mut ::std::io::stderr(), $($arg)*);
            r.expect("failed printing to stderr");
        }
    }
);

macro_rules! dbg {
    ($val:expr) => {
        // Use of `match` here is intentional because it affects the lifetimes
        // of temporaries - https://stackoverflow.com/a/48732525/1063961
        if cfg!(feature = "debug") {
            match $val {
                tmp => {
                    eprintln!(
                        "[{}:{}] {} = {:#?}",
                        file!(),
                        line!(),
                        stringify!($val),
                        &tmp
                    );
                    tmp
                }
            }
        } else {
            $val
        }
    };
}

fn main() {
    input! {
        s: String,
    }

    if s.len() > 9 {
        println!("NO");
        return;
    }

    for flags in 0..(1 << 4) {
        let mut answer = String::new();
        if flags & (1 << 0) != 0 {
            answer.push('A')
        }

        answer += "KIH";

        if flags & (1 << 1) != 0 {
            answer.push('A')
        }

        answer.push('B');

        if flags & (1 << 2) != 0 {
            answer.push('A')
        }

        answer.push('R');

        if flags & (1 << 3) != 0 {
            answer.push('A')
        }

        if answer == s {
            println!("YES");
            return;
        }
    }

    println!("NO");
}


Measured memory_bytes: 4352