/*
  Author: Anny
  Description: ¨­¤ÀÃÒÀˬd½X 
  Date: 2006/12/04
  Filename: idtest.c
*/


#include <stdio.h>
#include <stdlib.h>
int main()
{
    char a_id[10];
    char c_id[11];
    int check_num;
    int check;
    int i;
    
    gets(a_id);
    check_num = a_id[9] - '0';
    
    switch (a_id[0])
    {
        case 'A':
            c_id[0] = 1;
            c_id[1] = 0;
            break;
                   
        case 'B':
            c_id[0] = 1;
            c_id[1] = 1;
            break;  
            
        case 'C':
            c_id[0] = 1;
            c_id[1] = 2;
            break;  
            
        case 'D':
            c_id[0] = 1;
            c_id[1] = 3;
            break;
        
        case 'E':
            c_id[0] = 1;
            c_id[1] = 4;
            break;

        case 'F':
            c_id[0] = 1;
            c_id[1] = 5;
            break;

        case 'G':
            c_id[0] = 1;
            c_id[1] = 6;
            break;
            
        case 'H':
            c_id[0] = 1;
            c_id[1] = 7;
            break;
            
        case 'I':
            c_id[0] = 3;
            c_id[1] = 4;
            break;
 
        case 'J':
            c_id[0] = 1;
            c_id[1] = 8;
            break;

        case 'K':
            c_id[0] = 1;
            c_id[1] = 9;
            break;

        case 'L':
            c_id[0] = 2;
            c_id[1] = 0;
            break;
            
        case 'M':
            c_id[0] = 2;
            c_id[1] = 1;
            break;
            
        case 'N':
            c_id[0] = 2;
            c_id[1] = 2;
            break;  
            
        case 'O':
            c_id[0] = 3;
            c_id[1] = 5;
            break;

        case 'P':
            c_id[0] = 2;
            c_id[1] = 3;
            break;
            
        case 'Q':
            c_id[0] = 2;
            c_id[1] = 4;
            break;
            
        case 'R':
            c_id[0] = 2;
            c_id[1] = 5;
            break;  
                        
        case 'S':
            c_id[0] = 2;
            c_id[1] = 6;
            break;
            
        case 'T':
            c_id[0] = 2;
            c_id[1] = 7;
            break;
            
        case 'U':
            c_id[0] = 2;
            c_id[1] = 8;
            break;              

        case 'V':
            c_id[0] = 2;
            c_id[1] = 9;
            break;  
                        
        case 'W':
            c_id[0] = 3;
            c_id[1] = 2;
            break;
            
        case 'X':
            c_id[0] = 3;
            c_id[1] = 0;
            break;
            
        case 'Y':
            c_id[0] = 3;
            c_id[1] = 1;
            break;                           
            
        case 'Z':
            c_id[0] = 3;
            c_id[1] = 3;
            break;          
                                 
    }
    
    for (i=2; i<=9; i++)
      c_id[i] = a_id[i-1]-'0';
      
    check = c_id[0] * 1;
    
    for (i=1; i<=9; i++)
        check += c_id[i] * (10-i);
        
    //printf("check = %d\n", check);
    check %= 10;
    
    if (check > 0)
       check = 10 - check;
        
    printf("check_num = %d\n\n", check_num); 
    printf("check = %d\n", check); 
    
    if (check_num == check)
        printf("Valid ID.\n");
    else
        printf("Invalid ID.\n");
    
    system("PAUSE");
    return 0 ;
}