def kaprekarNumbers(p, q):
    # Write your code here
    kapN = []    
    for i in range(p, q+1, 1): 
        sqr = str(i**2)
        if i == 1:
            kapN.append(str(i))
        elif len(sqr) < 2:
            pass
        else:         
            d = math.ceil(len(sqr) / 2)           
            r = int(sqr[-d:])
            l = int(sqr[:-d])
            if r > 0 and l > 0 and r+l == i:
                kapN.append(str(i))
    if len(kapN) == 0:
        print('INVALID RANGE')
    print(' '.join(kapN))