https://www.acmicpc.net/problem/10101
a=int(input())
b=int(input())
c=int(input())
sum=a+b+c
if sum==180:
if a==60 and b==60 and c==60: print("Equilateral")
elif a==b or b==c or a==c: print("Isosceles")
else: print("Scalene")
else: print("Error")