// editor1
#include<stdio.h>
#include<stdbool.h>
const char*classify_triangle(int a,int b,int c){
    if(!(a>=10&&a<=100&&b>=10&&b<=100&&c>=10&&c<=100)){
        return"Invalid input";
    }
    if(a==b&&b==c){
        return"Equilateral";
    }
    else if(a==b||b==c||a==c){
        return"Isoceles";
    }else{
        return"Scalene";
    }
}
int main(){
   int side1=10;
   int side2=20;
   int side3=30;
   constraints(10<=side<=100)
    printf("%d%d%d:%s\n",side1,side2,side3,classify_triangle(side1,side2,side3));
    return 0;
}