#include <bits/stdc++.h>   using namespace std;   using ll = long long;   int main() {     int A, B;     cin >> A >> B;     string a, b;     cin >> a >> b;     int p = 0, m = a.size();     for (int i = 0; i + a.size() <= b.size(); i++) {       int k = 0;       for (int j = 0; j < a.size(); j++) {         if (a[j] != b[i + j]) k++;       }       if (k < m) {         m = k;         p = i;       }     }     vector<int> v;     for (int i = 0; i < a.size(); i++) {       if (a[i] != b[i + p]) v.push_back(i);     }     cout << v.size() << endl;     for (int i = 0; i < v.size(); i++) {       cout << v[i] + 1 <<    ;     }     return 0;   }   