// https://atcoder.jp/contests/agc041/tasks/agc041_c
//
#![allow(unused_imports)]
use std::io::*;
use std::io::Write;
use std::fmt::*;
use std::str::*;
use std::cmp::*;
use std::collections::*;

#[allow(unused_macros)]
macro_rules! input {
    (source = $s:expr, $($r:tt)*) => {
        let mut iter = $s.split_whitespace();
        input_inner!{iter, $($r)*}
    };
    ($($r:tt)*) => {
        let s = {
            use std::io::Read;
            let mut s = String::new();
            std::io::stdin().read_to_string(&mut s).unwrap();
            s
        };
        let mut iter = s.split_whitespace();
        input_inner!{iter, $($r)*}
    };
}

#[allow(unused_macros)]
macro_rules! input_inner {
    ($iter:expr) => {};
    ($iter:expr, ) => {};

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

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

#[allow(unused_macros)]
macro_rules! read_value {
    ($iter:expr, ( $($t:tt),* )) => {
        ( $(read_value!($iter, $t)),* )
    };

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

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

    ($iter:expr, switch) => {
        {
            let ty = read_value!($iter, i32);
            if ty == 1 {
                vec![ty, read_value!($iter, i32), read_value!($iter, i32)]
            } else if ty == 2 {
                vec![ty, read_value!($iter, i32)]
            } else {
                vec![ty, read_value!($iter, i32)]
            }
        }
    };

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

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

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

#[allow(unused_macros)]
macro_rules! dvec {
    ($t:expr ; $len:expr) => {
        vec![$t; $len]
    };

    ($t:expr ; $len:expr, $($rest:expr),*) => {
        vec![dvec!($t; $($rest),*); $len]
    };
}

#[allow(unused_macros)]
macro_rules! ifv {
    ($t:expr, $a:expr, $b: expr) => {
        if $t { $a } else { $b }
    }
}

#[allow(unused_macros)]
macro_rules! fill {
    ($t:expr, $v:expr) => {
        for i in 0..$t.len() {
            $t[i] = $v;
        }
    };
}

#[allow(unused_macros)]
macro_rules! join {
    ($t:expr, $glue:expr) => {
        $t.into_iter().map(|w| w.to_string()).collect::<Vec<_>>().join($glue)
    };
}

#[allow(unused_macros)]
macro_rules! debug {
    ($($a:expr),*) => {
        println!(concat!($(stringify!($a), " = {:?}, "),*), $($a),*);
    }
}

// ===

fn paste(ans: &mut Vec<Vec<char>>, source: &Vec<Vec<char>>, f: usize) {
    let n = source.len();
    for i in 0..n {
        for j in 0..n {
            ans[f+i][f+j] = source[i][j];
        }
    }
}

fn main() {
    input! {
        n: usize
    };
    if n <= 2 {
        println!("-1");
        return;
    }


    let table3 = vec![
        vec!['a','a','.'],
        vec!['.','.','a'],
        vec!['.','.','a'],
    ];

    let table4 = vec![
        vec!['a','a','e','f'],
        vec!['b','b','e','f'],
        vec!['c','d','g','g'],
        vec!['c','d','h','h'],
    ];

    let table5 = vec![
        vec!['a','a','b','b','e'],
        vec!['.','c','c','d','e'],
        vec!['f','f','.','d','g'],
        vec!['h','.','i','.','g'],
        vec!['h','.','i','j','j'],
    ];

    let table7 = vec![
        vec!['a','a','b','b','c','.','.'],
        vec!['.','f','f','.','c','d','.'],
        vec!['.','g','g','.','.','d','e'],
        vec!['h','.','.','j','j','.','e'],
        vec!['h','.','.','k','k','l','l'],
        vec!['i','.','.','.','.','m','n'],
        vec!['i','.','.','.','.','m','n'],
    ];

    let mut ans = dvec!('.'; n, n);
    if n % 3 == 0 {
        for i in 0..n/3 {
            paste(&mut ans, &table3, i*3);
        }
    } else {
        'sc: for l4 in 0..n {
            for l5 in 0..n {
                let l45 = l4*4+l5*5;
                if l45 > n {
                    break;
                }
                if (n - l45) % 7 == 0 {
                    let l7 = (n-l45)/7;
                    for i in 0..l4 {
                        paste(&mut ans, &table4, i*4);
                    }
                    for i in 0..l5 {
                        paste(&mut ans, &table5, l4*4+i*5);
                    }
                    for i in 0..l7 {
                        paste(&mut ans, &table7, l4*4+l5*5+i*7);
                    }
                    break 'sc;
                }
            }
        }
    }

    for i in 0..n {
        println!("{}", join!(ans[i].clone(), ""));
    }
}


Measured memory_bytes: 9340