def kaprekarNumbers(p, q):
    # Write your code here
    exists = False
    for n in range(p, q+1):
        d = len(str(n))
        n_quare = str(n * n)
        left, right = n_quare[:-d], n_quare[-d:]
        
        if int(left or 0) + int(right) == n:
            print(n, end=" ")
            exists = True
    if not exists:
        print("INVALID RANGE")