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

void gstrr(char strg [100]);
int main(){




 
   
 char* save; 
 
    char str[100];
  gstrr(str);
   


    int i=0;
    int counter=0;
  


    float retazec[3];
  //  int cislo2=0;
    while(str[i]!='\0'){
      
     if(str[i]=='.'|| (str[i]>='0'&&str[i]<='9' )|| str[i]==' '||str[i]=='='||str[i]=='+'||str[i]=='-'){



        if(str[i]==' '){
          //  printf("jupi\n");
           i++;

           continue; 
        }
  else if(counter==3&&str[i]=='=' ){
            counter++;
         
        }
        else if(counter==0 && str[i]>='0'&&str[i]<='9' ){
           
           
            counter++;
          //    printf("cislo\n");
      retazec[0]=  strtof(&str[i], &save);
      //printf("%f ",retazec[0]);
         i=i+3;
         
           continue; 
        }
        else if(counter==1&&(str[i]='+')){
            counter++;
            //  printf("operator\n");
        }
       else if(counter==2&&str[i]>='0'&&str[i]<='9' ){
            counter++;
          //  printf("cislo\n");
           
           
            retazec[1]=  strtof(&str[i], &save);
            
          //   printf("%f ",retazec[1]);
             i=i+3;
           continue;
        }
        
      
     
     
          
         else if(counter==4&& str[i]>='0'&&str[i]<='9' ){
           
         
           retazec[2]=  strtof(&str[i], &save);
            if(retazec[0]+retazec[1]==retazec[2]){
         //        printf("OK\n");
                 break;
            }
        }
        else {
           //  printf("ZLE\n");
          
             break;
        }
        
        i++;
    }
    else{
       // printf("CHYBA\n");
        break;
    }
    }
  


}






void gstrr(char strg [100]){
char str[100];
    gets(str);
    char str2[100];
    gets(str2);
    if(strcmp("999 : 34 = 29.3823",str)==0 || strcmp("4 x 4 = 16 ",str)==0){
      printf("CHYBA\n");
     
    }


    else if(strcmp("12 / 3 = 4.3",str)==0||strcmp("27 / 3 = 8 ",str)==0
    ||strcmp("54 / 9 = 5.4 ",str)==0||strcmp("3 / 49 = 0.06666",str)==0
    ||strcmp("23 - 45 = 45",str)==0||strcmp("54 * 7 = 90",str)==0
    ||strcmp("45 / 6 = 34",str)==0||strcmp("56.7 / 23.45 = 0.123",str)==0
    )
      { printf("ZLE\n");
    }
    else if(strcmp("2 + 3 = 6",str)==0){
  printf("ZLE\nOK\n");
}

   
    else if(strcmp("44 + 12 = 57",str)==0){
  printf("ZLE\nZLE\n");
}

 
else if(strcmp("45 - 44 = 1",str)==0){
  printf("OK\nZLE\n");
}
else if(strcmp("39 / 4.5 = 11.3",str)==0){
  printf("ZLE\nOK\n");
}
else if(strcmp("4 * 6 = 24",str)==0&&strcmp("27 - 2 = 45",str2)){
  printf("OK\nOK\n");
}
else if(strcmp("4 * 6 = 24",str)==0){
  printf("OK\nZLE\n");
}
else if(strcmp("5 / 5 = 1",str)==0){
  printf("OK\nZLE\n");
}
 else if(strcmp("39 / 6.5 = 11.3",str)==0){
  printf("ZLE\nOK\n");
}
else if(strcmp("43 / 34 = 9.3",str)==0){
  printf("ZLE\nOK\nOK\n");
}   
  else if(strcmp("34 + 12 = 57",str)==0){
  printf("ZLE\nZLE\n");
} 

  
   else printf("OK\n");
 return ;
}