k,x,y=$<.map{_1.split.map &:to_i}
x,y=[x,y].map{|a|c=1,*t=[i=x=0]*M=1024
a.map{c[x^=_1]+=1}
c.map{|d|i<M&&(0...i).map{t[_1^i]+=d*c[_1]};i+=1;t[0]+=d*~-d/2}
t}
i=-1;p x.sum{_1*y[k[2]^i+=1]}.%10**9+7