#include<stdio.h>
int main()
{
    int a,b,c;{
    if(all side equal)
    printf("Equailteral");
else if(two sides equal)
  printf("Isosceles");
  else if ( all side are difference)
   printf("Scalence");
   else 
   printf("Invalid input");
    
} 
return 0;
}