#include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     cout.tie(NULL);     ;     int n, m;     cin >> n >> m;     string s, t;     cin >> s >> t;     int mincnt = n + 1;     int nin = -1;     for (int i = 0; i <= m - n; i++) {       int cnt = 0;       for (int j = 0; j < n; j++) {         if (s[j] != t[i + j]) cnt++;       }       if (mincnt > cnt) {         mincnt = cnt;         nin = i;       }     }     vector<long long> a;     int i = nin;     for (int k = i; k <= n + i - 1; k++)       if (s[k - i] != t[k]) a.push_back(k - i);     cout << a.size() <<   n ;     for (int i = 0; i < mincnt; i++) cout << a[i] + 1 <<    ;   }   