#include 
      
       #include 
       
        #include 
        
         #include 
         
          #include 
          
           #include 
           
            using namespace std;int color[3];char str[13]={ '0','1','2','3','4','5','6','7','8','9','A','B','C'};int main(){ scanf("%d %d %d",&color[0],&color[1],&color[2]); printf("#"); for(int i=0;i<3;i++){ int a=color[i]/13; int b=color[i]%13; printf("%c%c",str[a],str[b]); } printf("\n"); return 0;}