int getSum(long a){
    long sq = a * a;
    int digit = (int)log10(a) + 1;
    int result = sq % (int)pow(10, digit);
    int rest = (int)log10(sq) + 1 - digit;
    if(rest > 0) result += stoi(to_string(sq).substr(0, rest));
    return result;
}

void kaprekarNumbers(int p, int q) {
    bool valid_range = false;
    for(int i = p; i <= q; i++){
        int s = getSum(i);
        if(s == i){
           cout << i << " ";
           valid_range = true; 
        }  
    }
    if(!valid_range) cout << "INVALID RANGE";
}

module Main where

import Data.List (splitAt)

test :: Int -> Bool
test n = do
    let sn = show $ n ^ 2
    let len = length sn
    let (l, r) = splitAt (len `div` 2) sn
    let l' = if null l then 0 else read l :: Int
    let r' = if null r then 0 else read r :: Int
    n == l' + r'

solve :: Int -> Int -> [Int]
solve p q = filter test [p .. q]

main :: IO ()
main = do
    p <- readLn :: IO Int
    q <- readLn :: IO Int
    putStrLn $ do
        let ks = solve p q
        if null ks
            then "INVALID RANGE"
            else unwords $ map show $ solve p q

def kaprekarNumbers(p, q):
    flag = 0
    
    for i in range(p, q+1):
        d = 0
        temp = i
        
        while (temp > 0):
            d += 1
            temp = temp//10
        
        square = i*i
        
        if (square//pow(10, d) + square % pow(10, d) == i):
            flag = 1
            print(i, end=" ")
    
    if (flag == 0):
        print("INVALID RANGE")

p = int(input())
q = int(input())

kaprekarNumbers(p, q)

function kaprekarNumbers(p, q) {
    // Write your code here
    let arr = []
    if(p <= 1) arr.push(1)
    for(let i = p; i <= q; i++){
        let square = String(i * i);
        let first = square.slice(0, square.length/2)
        let second = square.slice(square.length/2, square.length)
        parseInt(first) + parseInt(second) == i && arr.push(i)
    }
    arr.length > 0 ? console.log(arr.toString().split(',').join(' ')) : console.log("INVALID RANGE")
}