7 2
-10 0 ? 1 ? 2 10
 1 1
0
 5 1
-3 -2 -1 0 1
 7 1
-4 ? ? ? ? ? 2
 17 1
? -13 ? ? ? -3 ? ? ? ? ? 10 ? ? ? ? 100
 3 1
-5 ? 0
 7 2
-10 0 ? 1 6 2 ?
 3 1
-3 ? -2
 6 1
-1 ? 1 2 3 4
 1 1
?
 9 2
-10 0 ? 1 ? 2 ? 3 ?
 10 2
3 ? 5 ? 7 ? 9 ? 11 ?
 9 2
? ? -10 ? ? ? 10 ? ?
 9 3
? ? ? ? ? ? ? ? ?
 7 2
? ? 10 ? ? ? ?
 5 1
1000000000 ? ? ? ?
 7 3
1 ? -1000000000 ? 100 ? 2
 7 2
? ? -10 ? ? ? ?
 39 3
-5 1 -13 ? 2 -12 ? 3 -11 -2 4 -10 ? 5 -9 0 6 -8 ? 7 -7 ? 8 -6 5 9 -5 ? 10 -4 ? 11 -3 ? 12 -2 10 13 -1
 7 2
? ? 10 ? -10 ? ?
 7 1
-2 ? ? ? ? ? 4
 7 2
-10 0 0 1 ? 2 ?
 9 2
-10 0 ? 1 -6 2 ? 3 ?
 7 3
1 ? -1000000000 ? 100 ? 3
 9 2
-10 0 ? 1 ? 2 ? 3 0
 9 2
10 0 ? 1 ? 2 ? 3 ?
 3 1
-1 ? 1
 10 1
-2 ? ? ? ? ? ? 5 ? 10
 5 2
? ? -1000000000 ? ?
 2 1
-1000000000 1000000000
 7 2
-10 0 ? 1 -6 2 ?
 5 4
-1 ? ? ? 2
 7 2
10 0 ? 1 ? 2 ?
 7 2
-10 0 ? 1 ? 2 0
 7 2
-10 0 ? 1 ? 2 ?
 7 2
? ? -10 ? 10 ? ?
 6 1
-3 ? ? ? ? 3
 9 2
-10 0 ? 1 ? 2 ? 3 10
 3 1
4 ? 5
 9 3
-5 0 -1 ? ? ? 0 5 1
 7 1
-3 ? ? ? ? ? 3

-10 0 -1 1 0 2 10
 0
 -3 -2 -1 0 1
 -4 -3 -2 -1 0 1 2
 -14 -13 -6 -5 -4 -3 -2 -1 0 1 2 10 11 12 13 14 100
 -5 -1 0
 -10 0 0 1 6 2 7
 Incorrect sequence
 -1 0 1 2 3 4
 0
 -10 0 -2 1 -1 2 0 3 1
 3 -2 5 -1 7 0 9 1 11 2
 -11 -2 -10 -1 0 0 10 1 11
 -1 -1 -1 0 0 0 1 1 1
 0 -1 10 0 11 1 12
 1000000000 1000000001 1000000002 1000000003 1000000004
 Incorrect sequence
 -11 -1 -10 0 -1 1 0
 -5 1 -13 -4 2 -12 -3 3 -11 -2 4 -10 -1 5 -9 0 6 -8 1 7 -7 2 8 -6 5 9 -5 6 10 -4 7 11 -3 8 12 -2 10 13 -1
 Incorrect sequence
 -2 -1 0 1 2 3 4
 -10 0 0 1 1 2 2
 -10 0 -7 1 -6 2 -1 3 0
 1 0 -1000000000 2 100 0 3
 -10 0 -3 1 -2 2 -1 3 0
 10 0 11 1 12 2 13 3 14
 -1 0 1
 -2 -1 0 1 2 3 4 5 6 10
 -1000000001 -1 -1000000000 0 0
 -1000000000 1000000000
 -10 0 -7 1 -6 2 0
 -1 0 0 0 2
 10 0 11 1 12 2 13
 -10 0 -2 1 -1 2 0
 -10 0 -1 1 0 2 1
 -11 -1 -10 0 10 1 11
 -3 -2 -1 0 1 3
 -10 0 -1 1 0 2 1 3 10
 Incorrect sequence
 -5 0 -1 -1 1 0 0 5 1
 -3 -2 -1 0 1 2 3 

import java.io.*;
import java.util.*;

public class cf293E {
	static InputReader in = new InputReader();
	static String str = "";
	static String[] arr;
	static boolean works = true;
	static int[] a;
	
	public static void main(String[] args) throws Exception {
		str = in.readLine();
		int n = Integer.parseInt(str.substring(0, str.indexOf(" ")));
		int k = Integer.parseInt(str.substring(str.indexOf(" ") + 1));
		boolean[] det = new boolean[n];
		a = new int[n];
		arr = in.readLine().split(" ");
		for(int i = 0; i < n; i++) {
			if(arr[i].equals("?")) {
				det[i] = false;
			} else {
				det[i] = true;
				a[i] = Integer.parseInt(arr[i]);
			}
		}
		long tot = 0;
		for(int i = 0; i < k; i++) {
			int lowerbound = -1000000000;
			int upperbound = 1000000000;
			int count = 0;
			int ind = 0;
			for(int j = i; j < n; j += k) {
				if(det[j]) {
					upperbound = Math.min(upperbound, a[j] - 1);
					comp(lowerbound, upperbound, count, ind, k);
					lowerbound = a[j] + 1;
					upperbound = 1000000000;
					ind = j + 1;
					count = 0;
				} else {
					count++;
				}
			}
			comp(lowerbound, upperbound, count, ind, k);
		}
		if(works) {
			for(int i = 0; i < n; i++) {
				System.out.print(a[i] + (i == n - 1 ? "\n" : " "));
			}
		} else {
			System.out.println("Incorrect sequence");
		}
	}

	public static void comp(int l, int r, int c, int s, int k) {
		if(s >= a.length) {
			return;
		}
		if(r - l + 1 < c) {
			works = false;
			return;
		}
		if(c % 2 == 1) {
			if(l <= -(c - 1) / 2 && (c - 1) / 2 <= r) {
				fill(s, s + (c - 1) * k, k, -(c - 1) / 2);
				return;
			}
			if((c - 1) / 2 <= r) {
				fill(s, s + (c - 1) * k, k, l);
				return;
			}
			fill(s, s + (c - 1) * k, k, r - c + 1);
			return;
		}
		if(l <= -c / 2 && c / 2 - 1 <= r) {
			fill(s, s + (c - 1) * k, k, -c / 2);
			return;
		}
		if(l <= -c / 2 + 1 && c / 2 <= r) {
			fill(s, s + (c - 1) * k, k, -c / 2 + 1);
			return;
		}
		if(c / 2 <= r) {
			fill(s, s + (c - 1) * k, k, r - c + 1);
			return;
		}
		fill(s, s + (c - 1) * k, k, l);
	}

	public static void fill(int s, int e, int k, int start) {
		int count = 0;
		for(int i = s; i <= e; i += k) {
			a[i] = start + count++;
		}
	}

	static class InputReader {
		BufferedReader br;
		public InputReader() {
			try {
				br = new BufferedReader(new FileReader("cf293E.in"));
			} catch(Exception e) {
				br = new BufferedReader(new InputStreamReader(System.in));
			}
		}

		public String readLine() throws Exception {
			return br.readLine();
		}
	}
}