[백준] 10101

a=int(input())
b=int(input())
c=int(input())
if a==60 and a==b and b==c: print("Equilateral")
elif  a+b+c ==180 and (a==b or b==c or a==c): print("Isosceles")
elif a+b+c==180: print("Scalene")
else : print("Error")