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.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Scanner;

public class E {
	static int n, k, QM;
	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		n = in.nextInt();
		k = in.nextInt();
		QM = Integer.MAX_VALUE;
		String reg;
		List<Integer>[] sseq = new ArrayList[k];
		for (int i=0; i<n; i++) {
			int j = i%k;
			if (sseq[j] == null) {
				sseq[j] = new ArrayList<Integer>();
			}
			reg = in.next();
			
			if (reg.equals("?")) {
				sseq[j].add(QM);
			} else {
				sseq[j].add(Integer.valueOf(reg));
			}
		}
		for (int i=0; i<sseq.length; i++) {
			sseq[i] = solve(sseq[i]);
			if (sseq[i]==null) {
				System.out.println("Incorrect sequence");
				return;
}		}
		
		for (int i=0; i<n; i++) {
			System.out.print(sseq[i%k].get(i/k)+" ");
		}
	}
	private static List<Integer> solve(List<Integer> seq) {
		seq.add(0, (int)-2e9);
		seq.add((int) 2e9);

		List<Integer> result = new ArrayList<>();
		int b, e, cnt;

		for (b=0; b<seq.size()-1;) {
			e = b+1;
			
			while (e<seq.size() && seq.get(e) == QM) {
				e++;
			}
			cnt = e-b-1;
			if (seq.get(b) + cnt >= seq.get(e)) {
				return null;
			}
			
			int from  = seq.get(b);
			int to = seq.get(e);
			result.add(from);
			
			if (from >=0 && to >=0) {
				for (int i1=0; i1<cnt; i1++) {
					result.add(from + i1 + 1);
				}
			} else if (from <=0 && to <=0){
				for (int i1=0; i1<cnt; i1++) {
					result.add(to-cnt+i1);
				}
			} else {
				List<Integer> list = new ArrayList<Integer>();
				for (int x=0; cnt>0; x++) {
					if (cnt>0 && from < x && x < to){
						list.add(x);
						cnt--;
					}
					if (x==0) {
						continue;
					}
					if (cnt>0 && from < -x && -x < to) {
						list.add(-x);
						cnt--;
					}
				}
				Collections.sort(list);
				result.addAll(list);
			}
			b = e;
		}
		result.remove(0);
		for (int i=0; i<result.size()-1; i++) {
			if (result.get(i) >= result.get(i+1)) {
				return null;
			}
		}
		return result;
	}

}