#include <bits/stdc++.h>
#define pq priority_queue
#define P pair<int, int>
#define P2 pair<int, P>
#define P3 pair<int, P2>
using namespace std;
typedef long long ll; typedef long double ld;
constexpr long long gcd(long long a, long long b){return b ? gcd(b, a % b) : a;}
constexpr long long lcm(long long a, long long b){return a / gcd(a, b) * b;}
constexpr int INF = 1e9, MOD = INF + 7, around[] = {0, 1, 1, -1, -1, 0, -1, 1, 0, 0};
constexpr int mod_pow(long long x, long long n, const int mod){long long ret=1;while(n){if(n&1)(ret*=x)%=mod;(x*=x)%=mod;n>>=1;}return ret;}
template<int n> struct Prime{bool arr[n+1];constexpr bool operator[](int k){return arr[k];}constexpr Prime():arr(){for(int i=2;i<n;i++){arr[i]=true;for(int j=2;j*j<=i;j++){if(!(i%j))arr[i]=false;}}}};
template<int n> struct Factorial{long long arr[n+1],ary[n+1];constexpr Factorial():arr(),ary(){arr[0]=1;ary[0]=1;for(int i=0;i<n;i++){arr[i+1]=arr[i]*(i+1)%MOD;ary[i+1]=mod_pow(arr[i+1],MOD-2,MOD);}}};
constexpr Factorial<10> fact;
constexpr Prime<10> prime;
constexpr int comb(int a, int b){long long pos = fact.arr[a], pot = fact.ary[a - b], por = fact.ary[b];return pos * pot % MOD * por % MOD;}
constexpr int vx[] = {1, 0, -1, 0}, vy[] = {0, 1, 0, -1};
constexpr int sqrtN = 512, logN = 32;
constexpr ld PI = abs(acos(-1));
constexpr ll LINF=1e18;

int main(){
	int n, m; cin >> n >> m;
	vector<int> g[25];
	int h[25] = {};
	for(int i = 0; i < m; i++){
		int a, b; cin >> a >> b;
		g[a - 1].push_back(b - 1);
		h[b - 1]++;
	}
	
	queue<int> qu;
	vector<int> vec;
	for(int i = 0; i < n; i++) if(!h[i]) qu.push(i);
	while(!qu.empty()){
		auto p = qu.front(); qu.pop();
		
		vec.push_back(p);
		for(auto e:g[p]){
			h[e]--;
			if(!h[e]) qu.push(e);
		}
	}
	
	for(auto s:vec) cout << s + 1 << endl;
	return 0;
}

