use std::io::Write; //#[target_feature(enable = "avx2")] unsafe fn run() { input! { t: usize, ask: [(usize, usize, bytes, bytes); t], } let out = std::io::stdout(); let mut out = std::io::BufWriter::new(out.lock()); for (n, m, a, b) in ask { let mut ans = vec![b'z'; n + 1]; let t = a .iter() .map(|a| if *a == b'?' { b'a' } else { *a }) .collect::>(); let a = a .into_iter() .map(|a| if a == b'?' { 0 } else { a - b'a' + 1 }) .collect::>(); let c = b .iter() .map(|&a| if a == b'?' { 0 } else { a - b'a' + 1 }) .collect::>(); for i in 0..=(n - m) { if a[i..(i + m)] .iter() .zip(c.iter()) .map(|p| *p.0 as u32 * ((*p.0 - *p.1) as u32).pow(2)) .sum::() == 0 { if ans.len() == n + 1 || &ans[i..(i + m)] > &b { ans.clear(); ans.extend(t.iter().cloned()); ans[i..(i + m)].copy_from_slice(&b); } } } if ans.len() == n + 1 { writeln!(out, "-1").ok(); } else { let ans = ans.into_iter().map(|c| c as char).collect::(); writeln!(out, "{}", ans).ok(); } } } fn main() { unsafe { run(); } } // ---------- begin input macro ---------- // reference: https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8 #[macro_export] 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)*} }; } #[macro_export] 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)*} }; } #[macro_export] macro_rules! read_value { ($iter:expr, ( $($t:tt),* )) => { ( $(read_value!($iter, $t)),* ) }; ($iter:expr, [ $t:tt ; $len:expr ]) => { (0..$len).map(|_| read_value!($iter, $t)).collect::>() }; ($iter:expr, chars) => { read_value!($iter, String).chars().collect::>() }; ($iter:expr, bytes) => { read_value!($iter, String).bytes().collect::>() }; ($iter:expr, usize1) => { read_value!($iter, usize) - 1 }; ($iter:expr, $t:ty) => { $iter.next().unwrap().parse::<$t>().expect("Parse error") }; } // ---------- end input macro ----------