def islejland(num):
    for x in range(1,10):
        for y in range(1,10):
            while True:
                if num == x**y + y**x:

                    return True
                continue

            else:
                return False
print(islejland(3))
import math
def isthreemorf(num):
    for x in range(1,1000):
        if num == math.pow(x, 3) and x == num[:-1]:
            return True
        continue




isthreemorf(4)