x=[float(input("enter a number ")),float(input("enter a number ")),float(input("enter a number "))]


if x[0] == x[2] or x[2] == x[1] or x[0] == x[2]  and x[1] != x[0] != x[2]:
    print("its a isosceles")
elif x[0] == x[1] == x[2] :
    print("its a equality ")
else:
    print("its scalene")