#include<stdio.h>
#include<stdlib.h>

int main( void )
{        
    int month, day;
    
    do{
        printf("Please input your birthday (MM.DD), input -1 to end: "); 
        scanf("%02d.%02d", &month, &day); 

        switch( month ){
                         case 1:
                                  if( day >= 1 && day <= 20 ) printf("???\n");                                          
                                  else if( day >= 21 && day <= 31 ) printf("???\n"); 
                                  else printf("?????\n");                                           
                         break;
               
                         case 2:
                                  if(day >= 1 && day <= 19) printf("???\n");                                          
                                  else if( day >= 20 && day <= 29) printf("???\n");                                           
                                  else printf("?????\n");                                          
                         break;
               
                         case 3:
                                  if(day >= 1 && day <= 19) printf("???\n");                                          
                                  else if( day >= 20 && day <= 31) printf("???\n");                                           
                                  else printf("?????\n");                                           
                         break;
               
                         case 4:
                                  if(day >= 1 && day <= 20) printf("???\n");                                          
                                  else if( day >= 21 && day <= 30) printf("???\n");                                           
                                  else printf("?????\n");                                           
                         break;
               
                         case 5:
                                  if(day >= 1 && day <= 21) printf("???\n");                                          
                                  else if( day >= 22 && day <= 31) printf("???\n");                                           
                                  else printf("?????\n");           
                         break;
               
                         case 6:
                                  if(day >= 1 && day <= 21) printf("???\n");                                          
                                  else if( day >= 22 && day <= 30) printf("???\n");                                           
                                  else printf("?????\n");                                           
                         break;
               
                         case 7:
                                  if(day >= 1 && day <= 23) printf("???\n");                                          
                                  else if( day >= 24 && day <= 31) printf("???\n");                                           
                                  else printf("?????\n");                                           
                         break;
               
                         case 8:
                                  if(day >= 1 && day <= 23) printf("???\n");                                          
                                  else if( day >= 24 && day <= 31) printf("???\n");                                           
                                  else printf("?????\n");                                           
                         break;
               
                         case 9:
                                  if(day >= 1 && day <= 23) printf("???\n");                                          
                                  else if( day >= 24 && day <= 30) printf("???\n");                                           
                                  else printf("?????\n");                                           
                         break;
               
                         case 10:
                                  if(day >= 1 && day <= 24) printf("???\n");                                          
                                  else if( day >= 25 && day <= 31) printf("???\n");                                           
                                  else printf("?????\n");                                           
                         break;
               
                         case 11:
                                  if(day >= 1 && day <= 23) printf("???\n");                                          
                                  else if( day >= 24 && day <= 30) printf("???\n");                                           
                                  else printf("?????\n");                                           
                         break;
               
                         case 12:
                                  if(day >= 1 && day <= 22) printf("???\n");                                         
                                  else if( day >= 23 && day <= 31) printf("???\n");                                           
                                  else printf("?????\n");                                           
                         break;
               
                         default:
                                if(month == -1);
                                else printf("????\n");         
                         break;
        }
        printf("\n"); 
    }while(month != -1);
        
    system("pause");
    return 0;
}