export {};

const input = require("fs").readFileSync(0).toString().trim().split('\n');
const [N, M]: number[] = input[0].split(" ").map(Number);

let graph: number[][] = Array.from({length: N+1}, () => []);
let inDegree: number[] = new Array(N+1).fill(0);
for(let i=1; i<=M; i++) {
    const line: number[] = input[i].split(" ").map(Number);
    
    for(let j=1; j<line[0]; j++) {
        const [u, v]: number[] = [line[j], line[j+1]];
        graph[u].push(v);
        inDegree[v]++;
    }
}

let qu: number[] = [];
let idx: number = 0;
for(let n=1; n<=N; n++) {
    if (inDegree[n] === 0) qu.push(n);
}

while (idx < qu.length) {
    const current: number = qu[idx++];

    for(let next of graph[current]) {
        inDegree[next]--;
        if(inDegree[next] === 0) qu.push(next);
    }
}

if (qu.length < N) console.log(0);
else console.log(qu.join("\n"));