def r
gets.split.map &:to_i
end
M=1024
s=->a{c=[1]+[x=0]*M
a.each{c[x^=_1]+=1}
t=[0]*M
(0...M).each{|i|(0...i).each{t[i^_1]+=c[i]*c[_1]}
t[0]+=c[i]*~-c[i]/2}
t}
*n,k=r
a=r
b=r
x=s[a]
y=s[b]
p (0...M).sum{x[_1]*y[_1^k]}.%10**9+7