use proconio::{input, marker::Chars};

fn main() {
    input! {
        h: usize, w: usize,
        mut s: [Chars; h],
    }

    let mut seen = vec![vec![false; w]; h];
    for i in 0..h {
        for j in 0..w {
            if seen[i][j] || s[i][j] == '.' {
                continue;
            }

            let k = if s[i][j] == 'y' { 4 } else { 1 };
            s[i][j + k] = s[i][j + k].to_ascii_uppercase();

            for k in 0..6 {
                seen[i][j + k] = true;
            }
        }
    }

    for row in &s {
        let row = row.iter().collect::<String>();
        println!("{row}");
    }
}