int a,b,c
scanf("%d%d%d",&a,&b,&c);
if(a<=0||b<=0||c<=0){
    printf("Invalid input");
    else if(a==b && b==c){
    printf("equilateral");}
    else if(a==b ||b==c||a==c){
    printf("Isoceles");
    else{
    printf("scalence");
}
    return 0;
    }