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 Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        InputReader in = new InputReader(inputStream);
        OutputWriter out = new OutputWriter(outputStream);
        TaskE solver = new TaskE();
        solver.solve(in, out);
        out.close();
    }
}
class TaskE {
    public void solve(InputReader in, OutputWriter out) {
        int n = in.nextInt();
        int k = in.nextInt();
        List<Integer> list[] = new List[k];
        String val;
        for(int i=0;i<n;i++) {
            if(list[i%k] == null) list[i%k] = new ArrayList<>();
            val = in.next();
            if(val.equals("?")) {
                list[i%k].add(Integer.MAX_VALUE);
            } else {
                list[i%k].add(Integer.parseInt(val));
            }
        }
        for(int i=0;i<k;i++) {
            list[i] = solveList(list[i]);
            if(list[i] == null) {
                out.printLine("Incorrect sequence");
                return;
            }
        }
        for(int i=0;i<n;i++) {
            out.print(list[i%k].get(i/k) + " ");
        }
    }
    private List<Integer> solveList(List<Integer> list) {
        List<Integer> result = new ArrayList<>();
        list.add(Integer.MAX_VALUE-1);
        int lastIndex = -1;
        for(int i=0;i<list.size();i++) {
            if(list.get(i) != Integer.MAX_VALUE) {
                int previous = result.isEmpty() ? Integer.MIN_VALUE : result.get(result.size()-1);
                int next = list.get(i);
                int numberOfElements = i-lastIndex-1;
                if(previous >= 0) {
                    for(int j=1; j<= numberOfElements;j++) result.add(previous+j);
                }
                else if(next <= 0) {
                    for(int j=numberOfElements; j >=1 ; j--) result.add(next-j);
                } else if(numberOfElements > 0) {
                    ArrayDeque<Integer> queue = new ArrayDeque<>();
                    queue.add(0);
                    int k = 1;
                    while(queue.size()+2 <= numberOfElements && -k > previous && k < next) {
                        queue.addLast(k);
                        queue.addFirst(-k);
                        k++;
                    }
                    int l = k;
                    while(queue.size()+1 <= numberOfElements && -k > previous) {
                        queue.addFirst(-k);
                        k++;
                    }
                    while(queue.size()+1 <= numberOfElements) {
                        queue.addLast(l);
                        l++;
                    }
                    result.addAll(queue);
                }
                result.add(next);
                lastIndex = i;

            }
        }
        if(increasing(result)) {
            return result.subList(0, result.size()-1);
        }
        return null;
    }

    private boolean increasing(List<Integer> result) {
        int last = Integer.MIN_VALUE;
        for(int value : result) {
            if(value <= last) return false;
            last = value;
        }
        return true;
    }
}


//int previous = result.isEmpty() ? Integer.MIN_VALUE : result.get(result.size()-1);
//int next = list.get(i);
//if(previous != Integer.MIN_VALUE && i - lastIndex - 1 > next - previous - 1) return null;
//        if(previous >= 0) {
//        for(int j=1;j<=i-lastIndex-1;j++) result.add(previous+j);
//        } else if(next <= 0) {
//        for(int j=1;j<=i-lastIndex-1;j++) result.add(next-j);
//        }


class InputReader {
    public BufferedReader reader;
    public StringTokenizer tokenizer;
    public InputReader(InputStream stream) {
        reader = new BufferedReader(new InputStreamReader(stream), 32768);
        tokenizer = null;
    }
    public String next() {
        while (tokenizer == null || !tokenizer.hasMoreTokens()) {
            try {
                tokenizer = new StringTokenizer(reader.readLine());
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
        }
        return tokenizer.nextToken();
    }
    public boolean hasNext() {
        while (tokenizer == null || !tokenizer.hasMoreTokens()) {
            try {
                String line = reader.readLine();
                if ( line == null ) {
                    return false;
                }
                tokenizer = new StringTokenizer(line);
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
        }
        return true;
    }
    public int nextInt() {
        return Integer.parseInt(next());
    }
    public long nextLong() {
        return Long.parseLong(next());
    }
    public double nextDouble() { return Double.parseDouble(next());}
}
class OutputWriter {
    private final PrintWriter writer;
    public OutputWriter(OutputStream outputStream) {
        writer = new PrintWriter(new BufferedWriter(new OutputStreamWriter(outputStream)));
    }
    public OutputWriter(Writer writer) {
        this.writer = new PrintWriter(writer);
    }
    public void print(Object... objects) {
        for (int i = 0; i < objects.length; i++) {
            if ( i != 0 ) {
                writer.print(' ');
            }
            writer.print(objects[i]);
        }
    }
    public void printLine(Object... objects) {
        print(objects);
        writer.println();
    }
    public void close() {
        writer.close();
    }
}
