use std::io::{self, BufReader, Read, Stdin};
use std::str::FromStr;
use std::string::String;

#[derive(Debug)]
pub struct Scanner<R> {
    reader: BufReader<R>,
}

fn scanner() -> Scanner<Stdin> {
    Scanner::new(io::stdin())
}

impl<R: io::Read> Scanner<R> {
    pub fn new(read: R) -> Scanner<R> {
        Scanner {
            reader: BufReader::new(read),
        }
    }

    pub fn next_str(&mut self) -> Option<String> {
        let mut buf = [0; 1];
        let size = self.reader.read(&mut buf).unwrap();
        if size == 0 {
            None {}
        } else {
            let first = self.skip_whitespace(&mut buf);
            if first.is_none() {
                return None {};
            }
            let mut v = vec![buf[0]];
            loop {
                let size = self.reader.read(&mut buf).unwrap();
                if size == 0 || buf[0].is_ascii_whitespace() {
                    break;
                }
                v.push(buf[0]);
            }
            Some(String::from_utf8(v).unwrap())
        }
    }

    pub fn next_line(&mut self) -> Option<String> {
        let mut buf = [0; 1];
        let mut v: Vec<u8> = vec![];
        let mut size = self.reader.read(&mut buf).unwrap();
        if size == 0 {
            return None {};
        }
        loop {
            if size == 0 || char::from(buf[0]) == '\n' {
                return Some(String::from_utf8(v).unwrap());
            }
            v.push(buf[0]);
            size = self.reader.read(&mut buf).unwrap();
        }
    }

    pub fn next_vec<S: FromStr>(&mut self, size: u32) -> Vec<S> {
        let mut v: Vec<S> = vec![];
        for _ in 0..size {
            let token = self.next_str().unwrap();
            v.push(S::from_str(&token).ok().unwrap());
        }
        v
    }

    pub fn next_as<S: FromStr>(&mut self) -> Option<S> {
        if let Some(s) = self.next_str() {
            if let Ok(v) = S::from_str(&s) {
                return Some(v);
            }
        }
        None {}
    }

    pub fn next_i32(&mut self) -> i32 {
        self.next_as::<i32>().unwrap()
    }

    pub fn next_i64(&mut self) -> i64 {
        self.next_as::<i64>().unwrap()
    }

    pub fn next_f32(&mut self) -> f32 {
        self.next_as::<f32>().unwrap()
    }

    pub fn next_f64(&mut self) -> f64 {
        self.next_as::<f64>().unwrap()
    }

    fn skip_whitespace(&mut self, mut buf: &mut [u8]) -> Option<u8> {
        loop {
            if !buf[0].is_ascii_whitespace() {
                return Some(buf[0]);
            }
            let size = self.reader.read(&mut buf).unwrap();
            if size == 0 {
                return None {};
            }
        }
    }
}

fn main() {
    let mut sc = scanner();
    let a = sc.next_i32();
    let b = sc.next_i32();
    let c = sc.next_i32();
    let d = sc.next_i32();
    let dur = b + (31 - a);
    let ans = if c <= dur {
        1
    } else if d <= dur {
        2
    } else {
        3
    };
    println!("{}", ans);
}