C :

#include <stdio.h>
#include <math.h>

#define sq(x) ((x)*(x))

int x[10],y[10],X[10],Y[10];
int i,j,k,f,a,A,d,D,s,S;

main(){
   while (1 == scanf("%d",&f) && f) {
      for (i=0;i<f;i++) scanf("%d%d",&x[i],&y[i]);
      for (i=0;i<f;i++) scanf("%d%d",&X[i],&Y[i]);
      a = sq(x[0]-x[1]) + sq(y[0]-y[1]);
      A = sq(X[0]-X[1]) + sq(Y[0]-Y[1]);
      for (i=0;i<f;i++) for (j=0;j<f;j++) {
         d = sq(x[i]-x[j]) + sq(y[i]-y[j]);
         D = sq(X[i]-X[j]) + sq(Y[i]-Y[j]);
         if ((long long)a*D != (long long)A*d) goto foo;
      }
      for (i=2;i<f;i++) {
         s = (x[1]-x[0])*(y[i]-y[0]) - (y[1]-y[0])*(x[i]-x[0]);
         S = (X[1]-X[0])*(Y[i]-Y[0]) - (Y[1]-Y[0])*(X[i]-X[0]);
         if (s < 0 && S > 0 || s > 0 && S < 0) goto foo;
      }
      printf("similar\n");
      continue;
      foo: printf("dissimilar\n");
   }
   if (f) printf("missing end delimiter\n");
}