#include <stdio.h>

int main(void)
{
  char a[11] = {0};
  int i, sum;
 
  while(scanf("%s", a) != EOF)
  {
    sum = 0;
    a[0] = toupper(a[0]);
    if(a[0] == 'I') a[0] = 34;
      else if(a[0] == 'O') a[0] = 35;
        else if(a[0] <= 'H') a[0] = a[0]-'A'+10;
          else if(a[0] <= 'N') a[0] = a[0]-'A'+9;
            else if(a[0] <= 'Z') a[0] = a[0]-'A'+8;
    for(i = 1; i<11; i++) a[i] -= '0';
    /*for(i = 0; i<10; i++) printf("%3d", a[i]);*/
    sum += a[0]/10 + a[0]%10*9;
    for(i = 1; i<9; i++) sum += a[i]*(9-i);
    sum += a[9];
    if(sum % 10 == 0) printf("real\n");
      else printf("fake\n");
   
    for(i = 0; i<10; i++) a[i] = 0;
  }
 
  return 0;
}

一直卡在line:9

後來發現是自己沒注意到WXYZ...分別代表的數字並不連續..... =   ="