#[allow(unused_imports)]
use std::cmp::*;
#[allow(unused_imports)]
use std::collections::*;
#[allow(unused_imports)]
use std::io::{Write, BufWriter};
// https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8
macro_rules! input {
    ($($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, [ $t:tt ]) => {{
        let len = read_value!($next, usize);
        read_value!($next, [$t; len])
    }};
    ($next:expr, $t:ty) => ($next().parse::<$t>().expect("Parse error"));
}

#[allow(unused)]
trait Change { fn chmax(&mut self, x: Self); fn chmin(&mut self, x: Self); }
impl<T: PartialOrd> Change for T {
    fn chmax(&mut self, x: T) { if *self < x { *self = x; } }
    fn chmin(&mut self, x: T) { if *self > x { *self = x; } }
}

fn main() {
    // In order to avoid potential stack overflow, spawn a new thread.
    let stack_size = 104_857_600; // 100 MB
    let thd = std::thread::Builder::new().stack_size(stack_size);
    thd.spawn(|| solve()).unwrap().join().unwrap();
}

fn solve() {
    #[allow(unused)]
    let out = std::io::stdout();
    #[allow(unused)]
    let mut out = BufWriter::new(out.lock());
    #[allow(unused)]
    macro_rules! puts {($($format:tt)*) => (let _ = write!(out,$($format)*););}
    #[allow(unused)]
    macro_rules! putvec {
        ($v:expr) => {
            for i in 0..$v.len() {
                puts!("{}{}", $v[i], if i + 1 == $v.len() {"\n"} else {" "});
            }
        }
    }
    macro_rules! fail {
        () => {
            println!(":(");
            return;
        }
    }
    input! {
        h: usize, w: usize,
        a: [usize; h],
        b: [usize; w],
        k: usize,
        xy: [(usize1, usize1); k],
    }
    if a.iter().sum::<usize>() != b.iter().sum::<usize>() {
        fail!();
    }
    let mut ai = vec![];
    for i in 0..h {
        ai.push((a[i], i));
    }
    ai.sort(); ai.reverse();
    let mut bi = vec![];
    for i in 0..w {
        bi.push((b[i], i));
    }
    bi.sort(); bi.reverse();
    let mut ans = vec![vec!['.'; w]; h];
    for (a, i) in ai {
        if a == 0 { continue; }
        if bi[a - 1].0 == 0 {
            fail!();
        }
        for j in 0..a {
            bi[j].0 -= 1;
            ans[i][bi[j].1] = 'o';
        }
        bi.sort(); bi.reverse();
    }
    for i in 0..k {
        let (x, y) = xy[i];
        if ans[x][y] == 'o' {
            panic!();
        }
        ans[x][y] = 'x';
    }
    puts!("Yay!\n");
    for i in 0..h {
        puts!("{}\n", ans[i].iter().cloned().collect::<String>());
    }
}