include<stdio.h>
int mani()
int a,b,c
scanf("%d %d %d",&a,&b,&c);
if(a<=||b<=0||c<+0);
printf("invalid iput");
}
else if(a==b && b==c ){
printf("equilateral");
}
else if(a==b || b==c || a==c){
    printf("isoceles");
    
    else{
        printf("scalene");
    }
    return 0;
}