/*
TASK: cannibal
LANG: C
*/
#include <stdio.h>

 int a[128];
 int b[128];
 int i,j;

 int main ()
  {
   for (i=1;i<=102;i++)
    {
     scanf("%d",&a[i]);
     if (a[i]==-1) j=i;
    }
   for (i=1;i<=102;i++)
    scanf("%d",&b[i]);
   if (b[j%102+1]!=-1) printf("%d\n",b[j%102+1]);
    else printf("%d\n",a[j!=1?j-1:102]);
   return 0;
  }
