#inclde<stdio.h>
int main()
{
    int a,b,c;
    scanf("%d%d%d",&a,&b,&c);
    if(a<=0//b<=0//c<=0){
        printf("lnvalid input");
        else if (a==b && b==c){
            printf("equilateral");}
            else if(a==b//b==c//a==c){
                printf("lsoceles");
                else{
                    print("scalence");
                }
                return 0;
                }