main(){
if(!DEBUG){freopen("transform.in","r",stdin);
freopen("transform.out","w",stdout);}
scanf("%d%c",&n,&before[0][0]);
for(i=0;i<n;i++)scanf("%s",before[i]);
for(i=0;i<n;i++)scanf("%s",after[i]);
if(tran1())puts("1");
else if(tran2())puts("2");
else if(tran3())puts("3");
else if(tran4())puts("4");
else if(tran6())puts("6");
else if(tran1() || tran2() || tran3())puts("5");
else puts("7");
if(DEBUG)scanf(" ");
}
/* calc observation matrix Q for given observer*/
void
findQ(void)
{
vec1 alpha, beta, gamma, v, w;
double E[5][5];
double F[5][5];
double G[5][5];
double H[5][5];
double U[5][5];
/* calc translation matrix F*/
tran3(eye.x, eye.y, eye.z, F);
/* calc rotation matrix G*/
alpha = angle(-direct.x, -direct.y);
rot3(3, alpha, G);
/* calc rotation matrix H*/
v = sqrt(direct.x*direct.x + direct.y*direct.y);
beta = angle(-direct.z, v);
rot3(2, beta, H);
/* calc rotation matrix U*/
w = sqrt(v*v + direct.z*direct.z);
gamma = angle(-direct.x*w, direct.y*direct.z);
rot3(3, -gamma, U);
/* combine the transformations to find Q*/
mult3(G, F, Q);
mult3(H, Q, E);
mult3(U, E, Q);
}