import std.conv, std.functional, std.range, std.stdio, std.string;
import std.algorithm, std.array, std.bigint, std.bitmanip, std.complex, std.container, std.math, std.mathspecial, std.numeric, std.regex, std.typecons;
import core.bitop;

class EOFException : Throwable { this() { super("EOF"); } }
string[] tokens;
string readToken() { for (; tokens.empty; ) { if (stdin.eof) { throw new EOFException; } tokens = readln.split; } auto token = tokens.front; tokens.popFront; return token; }
int readInt() { return readToken.to!int; }
long readLong() { return readToken.to!long; }
real readReal() { return readToken.to!real; }

bool chmin(T)(ref T t, in T f) { if (t > f) { t = f; return true; } else { return false; } }
bool chmax(T)(ref T t, in T f) { if (t < f) { t = f; return true; } else { return false; } }

int binarySearch(alias pred, T)(in T[] as) { int lo = -1, hi = cast(int)(as.length); for (; lo + 1 < hi; ) { const mid = (lo + hi) >> 1; (unaryFun!pred(as[mid]) ? hi : lo) = mid; } return hi; }
int lowerBound(T)(in T[] as, T val) { return as.binarySearch!(a => (a >= val)); }
int upperBound(T)(in T[] as, T val) { return as.binarySearch!(a => (a > val)); }


enum E = 60;

void main() {
  try {
    for (; ; ) {
      const N = readInt();
      auto A = new long[N];
      foreach (i; 0 .. N) {
        A[i] = readLong();
      }
      const Q = readInt();
      auto B = new long[Q];
      foreach (q; 0 .. Q) {
        B[q] = readLong();
      }
      
      auto prev = new int[E][N + 1];
      prev[0][] = -1;
      foreach (i; 0 .. N) {
        prev[i + 1][] = prev[i][];
        foreach (e; 0 .. E) {
          if ((A[i] >> e) & 1) {
            prev[i + 1][e] = i;
          }
        }
      }
      
      foreach (q; 0 .. Q) {
        int ans;
        long mask = (1L << E) - 1;
        long tar = B[q];
        for (int i = N; ; ) {
          int jm = -1;
          foreach (e; 0 .. E) {
            if ((mask >> e) & 1) {
              chmax(jm, prev[i][e]);
            }
          }
          if (jm == -1) {
            if (!(~tar & mask)) {
              if (i == 0) {
                ans = -1;
              } else {
                ++ans;
              }
            } else if (!tar) {
              // OK
            } else {
              ans = -1;
            }
            break;
          } else {
            const force = A[jm] & mask;
            debug {
              writefln("i = %s, mask = %s, tar = %s: jm = %s, force = %s", i, mask, tar, jm, force);
            }
            if (!(~tar & force)) {
              mask &= ~force;
              tar = tar & mask;
            } else if (!(tar & force)) {
              ++ans;
              mask &= ~force;
              tar = ~tar & mask;
            } else {
              ans = -1;
              break;
            }
            i = jm;
          }
        }
        writeln(ans);
      }
      
      debug {
        foreach (i; 0 .. N) {
          writefln("%60b %20s", A[i], A[i]);
        }
        foreach (p; 0 .. 1 << N) {
          long x;
          foreach (i; 0 .. N) {
            x |= A[i];
            if (p & 1 << i) {
              x ^= (1L << E) - 1;
            }
          }
          writefln("%0*b %s: %60b %20s", N, p, popcnt(p), x, x);
        }
      }
    }
  } catch (EOFException e) {
  }
}