#include<stdio.h>
int a,b,c
scanf("%d,%d,%d",&a,&b,&c);
if(a <= 0 || b <=0 || c <=o){
printf("Invalid input");
else if)(a ==b && b==c){
    printf("Equilatral");}
    else if(a==b || b==c || a==c){
        printf("Isoceles");
        else{
            printf)("scalence");        }
    }
    return0;
}