N=int(input())
A=list(map(int,input().split()))
Q=int(input())
B=list(map(int,input().split()))
X=[-1]*60
for i in range(60):
  for j in range(N-1,-1,-1):
    if A[j]&(1<<i):
      X[i]=j
      break
for i in range(Q):
  Y,Z=set(),set()
  for j in range(60):
    if B[i]&(1<<j):
      Y.add(X[j])
    else:
      Z.add(X[j])
  if len(Y&Z):
    print(-1)
  elif ((0 in Y)and(-1 in Y))or((0 in Z)and(-1 in Z)):
    print(-1)
  else:
    V=sorted(Y|Z,reverse=True)
    P=0
    for j in range(len(V)):
      if V[j] in Y:
        if (P&1)^(V[j]==-1):
          P+=1
      else:
        if (P&1)^(V[j]!=-1):
          P+=1
    print(P)