ll@N,@M,@--(A,B)[M],@--C[N],@W[10],@Q,@--(U,V)[Q],a[Q];rep(q,Q)a[q]=-1;REP(b,1024){ull c=sum[d,0,10@b>>d&1](W[d]);unionFind t('m',N,1);rep(j,M)b>>C[A[j]]&1&b>>C[B[j]]&&t(A[j],B[j]);rep[a,q](s,Q)t(U[q])-t(V[q])||(s<?=c);}wtLn(a(Q));