import java.io.*;
import java.util.*;
import java.util.Map.Entry;
import javax.swing.text.InternationalFormatter;
import java.math.*;
import java.util.Arrays;
public class RATHOD 
{
     public static void main(String[] args) throws IOException
    { 
     Reader sc=new Reader();    
     int n=sc.nextInt();
     int q=sc.nextInt();
     long ar[]=new long[n];
     int arp[]=new int[35];
     int temar[]=new int[35];
     int i,j;
     j=-1;
     for(i=0;i<n;i++)
     {
     ar[i]=sc.nextLong();
     int power=0;
     long temp=ar[i];
     while(temp>1)
     {
       temp=temp/2;
       power++;
     }
     
     arp[power]++;
     temar[power]++;
     }
     for(i=1;i<=q;i++)
     {
         long val=sc.nextLong();
         long sol=0;
         int flag=1;
         long one=1;
         int power=0;
         while((one<<power)<=val)
         {
             
             if(((one<<power)&(val))>0)
             {
                 
                 
                 for(j=power;j>=0;j--)
                 {
                     //System.out.println(j+" "+arp[power]);
                     if(arp[j]>=Math.pow(2,power)/(Math.pow(2,j)))
                     {
                          
                      arp[j]=(int) (arp[power]-(Math.pow(2,power)/(Math.pow(2,j))));
                      sol=sol+(long) ((Math.pow(2,power)/(Math.pow(2,j))));
                      break;
                     }
                 }
                 if(j==-1)
                 {
                     
                     flag=0;
                     break;
                 }
                 
             }
             power++;
             if(flag==0)
             break;
            
         }
         if(flag==0)
         System.out.println("-1");
         else
         System.out.println(sol);
         int p=0;
         for(p=0;p<35;p++)
         arp[p]=temar[p];
     }
    }
    
   
	// _________________________TEMPLATE_____________________________________________________________

	// private static int gcd(int a, int b) {
	// if(a== 0)
	// return b;
	//
	// return gcd(b%a,a);
	// }

	// static class comp implements Comparator<pair> {
	//
	// @Override
	// public int compare(pair o1, pair o2) {
	// return o2.b - o1.b;
	// }
	//
	// }

	static class pair implements Comparable<pair> {
		int min;
		int max;
		int ans;

		pair(int a, int b) {
			min = a;
			max = b;
		}

		@Override
		public int compareTo(pair o) {

			return (int) (this.min - o.max);

		}
	}

	public static class Reader {
		final private int BUFFER_SIZE = 1 << 16;
		private DataInputStream din;
		private byte[] buffer;
		private int bufferPointer, bytesRead;

		public Reader() {
			din = new DataInputStream(System.in);
			buffer = new byte[BUFFER_SIZE];
			bufferPointer = bytesRead = 0;
		}

		public Reader(String file_name) throws IOException {
			din = new DataInputStream(new FileInputStream(file_name));
			buffer = new byte[BUFFER_SIZE];
			bufferPointer = bytesRead = 0;
		}

		public String readLine() throws IOException {
			byte[] buf = new byte[100000 + 1]; // line length
			int cnt = 0, c;
			while ((c = read()) != -1) {
				if (c == '\n')
					break;
				buf[cnt++] = (byte) c;
			}
			return new String(buf, 0, cnt);
		}

		public int nextInt() throws IOException {
			int ret = 0;
			byte c = read();
			while (c <= ' ')
				c = read();
			boolean neg = (c == '-');
			if (neg)
				c = read();
			do {
				ret = ret * 10 + c - '0';
			} while ((c = read()) >= '0' && c <= '9');

			if (neg)
				return -ret;
			return ret;
		}

		public long nextLong() throws IOException {
			long ret = 0;
			byte c = read();
			while (c <= ' ')
				c = read();
			boolean neg = (c == '-');
			if (neg)
				c = read();
			do {
				ret = ret * 10 + c - '0';
			} while ((c = read()) >= '0' && c <= '9');
			if (neg)
				return -ret;
			return ret;
		}

		public double nextDouble() throws IOException {
			double ret = 0, div = 1;
			byte c = read();
			while (c <= ' ')
				c = read();
			boolean neg = (c == '-');
			if (neg)
				c = read();

			do {
				ret = ret * 10 + c - '0';
			} while ((c = read()) >= '0' && c <= '9');

			if (c == '.') {
				while ((c = read()) >= '0' && c <= '9') {
					ret += (c - '0') / (div *= 10);
				}
			}

			if (neg)
				return -ret;
			return ret;
		}

		private void fillBuffer() throws IOException {
			bytesRead = din.read(buffer, bufferPointer = 0, BUFFER_SIZE);
			if (bytesRead == -1)
				buffer[0] = -1;
		}

		private byte read() throws IOException {
			if (bufferPointer == bytesRead)
				fillBuffer();
			return buffer[bufferPointer++];
		}

		public void close() throws IOException {
			if (din == null)
				return;
			din.close();
		}

		public int[] nextIntArray(int n) throws IOException {
			int[] arr = new int[n];
			for (int i = 0; i < n; i++) {
				arr[i] = nextInt();
			}
			return arr;
		}

		public long[] nextLongArray(int n) throws IOException {
			long[] arr = new long[n];
			for (int i = 0; i < n; i++) {
				arr[i] = nextLong();
			}
			return arr;
		}

		public int[][] nextInt2DArray(int m, int n) throws IOException {
			int[][] arr = new int[m][n];
			for (int i = 0; i < m; i++) {
				for (int j = 0; j < n; j++)
					arr[i][j] = nextInt();
			}
			return arr;
		}

	}

}