g=[]
    for i in range(p,q+1):
      a=str(i**2)
      b=a[:len(a)//2]
      c=a[len(a)//2:]
      if c=='':
        c=0
      elif b=='':
        b=0
      if int(b)+int(c)==i:g.append(i)
    print('INVALID RANGE')if g==[]else print(*g)