#[allow(unused_imports)]
use std::char::from_digit;
#[allow(unused_imports)]
use std::cmp::{max, min};
#[allow(unused_imports)]
use std::collections::{BTreeMap, BTreeSet, BinaryHeap, HashMap, HashSet, VecDeque};
#[allow(unused_imports)]
use std::fs::File;
#[allow(unused_imports)]
use std::io::prelude::*;
#[allow(unused_imports)]
use std::io::{stdin, stdout, BufReader, BufWriter, Stdin, Stdout, Write};
#[allow(unused_imports)]
use std::mem::swap;
#[allow(unused_imports)]
use std::str::FromStr;

type BoxResult<T> = Result<T, Box<std::error::Error>>;


fn main() {
    let mut scanner = Scanner::new(stdin());
    let n = scanner.read::<usize>().unwrap();
    let mut points = vec![];
    let mut even = false;
    for i in 0..n {
        let line = scanner.read_vector::<i64>().unwrap();
        let (x, y) = (line[0], line[1]);
        points.push((x, y));
        if i == 0 {
            even = (x + y).abs() % 2 == 0;
        } else {
            if ((x + y).abs() % 2 == 0) ^ even {
                println!("-1");
                return;
            }
        }
    }
    let operations = vec!['L', 'U', 'D', 'R'];
    let mut lengths = vec![];
    for i in 0..31 {
        lengths.push(1 << i);
    }
    if even {
        lengths.push(1);
    }
    println!("{}", lengths.len());
    for i in 0..lengths.len() {
        if i != lengths.len() - 1 {
            print!("{} ", lengths[i]);
        } else {
            println!("{}", lengths[i]);
        }
        }
    for (x, y) in points.into_iter() {
        let mut arms = vec![0; 31];
        if even {
            arms.push(0);
        }
        let (u, v) = ((x + y + (1 << 31)) / 2, (x - y + (1 << 31)) / 2);
        //println!("{} {}", u, v);
        let (mut crt_u, mut crt_v) = (0, 0);
        for i in (0..31).rev() {
            if u - crt_u >= lengths[i] {
                arms[i] |= 1;
                crt_u += lengths[i];
            }
            if v - crt_v >= lengths[i] {
                arms[i] |= 1 << 1;
                crt_v += lengths[i];
            }
            //println!("{} {}", crt_u, crt_v);
        }
        for i in 0..arms.len() {
            if i != arms.len() - 1 {
                print!("{}", operations[arms[i]]);
            } else {
                println!("{}", operations[arms[i]]);
            }
        }
    }
}
#[allow(dead_code)]
struct Scanner<R> {
    reader: BufReader<R>,
    buffer: String,
}
impl<R> Scanner<R>
where
    R: Read,
{
    #[allow(dead_code)]
    fn new(inner: R) -> Scanner<R> {
        let reader = BufReader::new(inner);
        let buffer = String::new();
        Scanner {
            reader: reader,
            buffer: buffer,
        }
    }
    #[allow(dead_code)]
    fn with_capacity(capacity: usize, inner: R) -> Scanner<R> {
        let reader = BufReader::with_capacity(capacity, inner);
        let buffer = String::new();
        Scanner {
            reader: reader,
            buffer: buffer,
        }
    }

    #[allow(dead_code)]
    fn read_line(&mut self) -> BoxResult<String> {
        self.reader.read_line(&mut self.buffer)?;
        let cloned = self.buffer.trim().to_string();
        self.buffer.clear();
        Ok(cloned)
    }

    #[allow(dead_code)]
    fn read<T>(&mut self) -> BoxResult<T>
    where
        T: FromStr,
        T::Err: std::fmt::Debug,
        T::Err: std::error::Error,
        T::Err: 'static,
    {
        self.reader.read_line(&mut self.buffer)?;
        let parsed = self.buffer.trim().parse()?;
        self.buffer.clear();
        Ok(parsed)
    }
    #[allow(dead_code)]
    fn read_vector<T>(&mut self) -> BoxResult<Vec<T>>
    where
        T: FromStr,
        T::Err: std::fmt::Debug,
        T::Err: std::error::Error,
        T::Err: 'static,
    {
        self.reader.read_line(&mut self.buffer)?;
        let parsed_vec = self
            .buffer
            .trim()
            .split_whitespace()
            .map(|s| s.parse())
            .collect::<Result<Vec<_>, _>>()?;
        self.buffer.clear();
        Ok(parsed_vec)
    }
    #[allow(dead_code)]
    fn read_matrix<T>(&mut self, lines: usize) -> BoxResult<Vec<Vec<T>>>
    where
        T: FromStr,
        T::Err: std::fmt::Debug,
        T::Err: std::error::Error,
        T::Err: 'static,
    {
        let mut parsed_matrix = vec![];
        for _ in 0..lines {
            self.reader.read_line(&mut self.buffer)?;
            parsed_matrix.push(
                self.buffer
                    .trim()
                    .split_whitespace()
                    .map(|s| s.parse())
                    .collect::<Result<Vec<_>, _>>()?,
            );
            self.buffer.clear();
        }
        Ok(parsed_matrix)
    }
    #[allow(dead_code)]
    fn read_chars(&mut self) -> BoxResult<Vec<char>> {
        self.reader.read_line(&mut self.buffer)?;
        let chars = self.buffer.trim().chars().collect::<Vec<_>>();
        self.buffer.clear();
        Ok(chars)
    }
}


Measured memory_bytes: 4352