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

import static java.lang.Math.*;
import static java.util.Arrays.*;
import static java.util.Collections.*;



public class Main{
	
	// ArrayList<Integer> lis = new ArrayList<Integer>();
	// ArrayList<String> lis = new ArrayList<String>();
	// PriorityQueue<P> que = new PriorityQueue<P>();
	// PriorityQueue<Integer> que = new PriorityQueue<Integer>();
	//  Stack<Integer> que = new Stack<Integer>();
	//HashMap<Long,Long> map = new HashMap<Long,Long>();
    //	static long sum=0;
	// 1000000007 (10^9+7)
	static int mod = 1000000007;
	//static int mod = 1000000009; ArrayList<Integer> l[]= new ArrayList[n];
 //   static int dx[]={1,-1,0,0};
	//static int dy[]={0,0,1,-1};
	//static int dx[]={1,-1,0,0,1,1,-1,-1};
    //static int dy[]={0,0,1,-1,1,-1,1,-1};
	
	//static Set<Integer> set = new HashSet<Integer>();
	//static ArrayList<Integer> l[];
    //static int parent[][],depth[],node,max_log;
//   static ArrayList<Integer> nd[]= new ArrayList[2001];

public  static void main(String[] args)   throws Exception, IOException{

	//Scanner sc =new Scanner(System.in);
	
	Reader sc = new Reader(System.in);
   

	//int n=sc.nextInt();//,m=sc.nextInt(),k=sc.nextInt();
	//int a=sc.nextInt(),b=sc.nextInt(),c=sc.nextInt();
	
	int n=sc.nextInt(),k=sc.nextInt();//,m=sc.nextInt();//,k=sc.nextInt(),s=0;
	int a[]=new int[n];
	int b[]=new int[n];

   for (int i = 0; i < n; i++) {
	String s=sc.nextString();
	if(s.charAt(0)=='?') b[i]++;
	else a[i]=Integer.valueOf(s);
	   
  }
   for (int i = 0; i < k; i++) {
	

		 int le=-1,r=0,h=0,ls=-1,f=0,ff=0;
		 
		 for (int j = i; j < n; j+=k) {
		//db(le,r);
			 ls=j;
		   if(b[j]>0)h++;
		   else{
			   r=a[j];
			   
			 //  db(le,r,h);
			   if(h<1){le=r;continue;}
			   ff++;
			   if(f<1){
				   f++;
				   int up=h%2==0?h/2-1:h/2,dw=up-h+1;

					   if( up>=r ){
						    fc(a, h, j-h*k, dw-(up-r+1) ,k);
					   }
					   else fc(a, h, j-h*k, dw,k);
					//  db(up,dw,a);
					   le=r;
					   h=0;
			   }
			   else{
				 
				   if(r-le-1<h){System.out.println("Incorrect sequence"); return;}
				   
				   int up=h%2==0?h/2-1:h/2,dw=up-h+1;
				   
				   if( up>=r ){
					    fc(a, h, j-h*k, r-h,k);
				   }
				   else if( dw<=le ){
					    fc(a, h, j-h*k, le+1,k);
				   }
				   else fc(a, h, j-h*k, dw,k);
				   
				   le=r;
			   }
			   h=0;
		   }
		   
	}
	   
	   if(h>0){
		   int j=ls+k;
		   
		  // db(le,r,h);
		   int up=h%2==0?h/2-1:h/2,dw=up-h+1;
		   
		   if(le<0){
			   fc(a, h, j-h*k, dw,k);
		   }
		   else{
			 
			   
			   
			    if( dw<=le ){
				   fc(a, h, j-h*k, le+1,k);
			   }
			   else fc(a, h, j-h*k, dw,k);
			   
		   }
		   ff++;
	   }
	   
	   if(ff<1){
		   
		   for (int j = i; j+k < n; j+=k) {
			if( a[j]>=a[j+k] ){System.out.println("Incorrect sequence"); return;}
		}
		   
	   }
	   
}
   
   
  
   
	for (int i = 0; i < b.length; i++) {
		System.out.print(a[i]+" ");
	}
    
  
}

static void fc(int d[],int l,int st,int x,int k){
	//db(l,st,x,k);
	for (int i = 0; i < l; i++)d[st+i*k]=x++;
	
}


/*
  static class P implements Comparable<P>{
	int id, d; ;
	P(int id,int d){
		this.id=id;
		this.d=d;
	} 
	
	public int compareTo(P x){
	//	return  (-x.d+d)>=0?1:-1  ; // ascend long
	//	return   -x.d+d  ; // ascend
		 return   x.d-d  ; //descend
	   }
 
}//*/


static void db(Object... os){
    System.err.println(Arrays.deepToString(os));

}

static boolean validpos(int x,int y,int r, int c){
	
	return x<r && 0<=x && y<c && 0<=y;
	
}

static boolean bit(int x,int k){
	// weather k-th bit (from right) be one or zero
	return  ( 0 < ( (x>>k) & 1 )  )  ? true:false;
}


}




class Reader
{ 
	private BufferedReader x;
	private StringTokenizer st;
	
	public Reader(InputStream in)
	{
		x = new BufferedReader(new InputStreamReader(in));
		st = null;
	}
	public String nextString() throws IOException
	{
		while( st==null || !st.hasMoreTokens() )
			st = new StringTokenizer(x.readLine());
		return st.nextToken();
	}
	public int nextInt() throws IOException
	{
		return Integer.parseInt(nextString());
	}
	public long nextLong() throws IOException
	{
		return Long.parseLong(nextString());
	}
	public double nextDouble() throws IOException
	{
		return Double.parseDouble(nextString());
	}
}