#include <bits/stdc++.h>
#define int long long
using namespace std;
vector<int> powers(int p, int n, int mod){
    vector<int> q(n+1);
    q[0]=1;
    for (int i=1; i<=n; i++){
        q[i]=q[i-1]*p;
        q[i]%=mod;
    }
    return q;
}

vector<int> hash_function(int p, int mod, string s){
    int n = (int) s.size();
    vector<int> h(n+1);
    for (int i=1; i<=n; i++){
        h[i]=h[i-1]*p+s[i-1];
        h[i]%=mod;
    }
    return h;
}
int hash_func(int mod, vector<int>& h, vector<int>& q, int l, int r){
    int x=h[r]-h[l]*q[r-l];
    x=((x%mod)+mod)%mod;
    return x;
}
int res(int mod, vector<int>& q, string s, int result, int i, char x){
    int n=(int) s.size();
    int cur=result;
    cur-=s[i]*q[n-1-i];
    cur+=x*q[n-1-i];
    cur=(cur%mod+mod)%mod;
    return cur;
}
signed main(){
    int mod1=1000000007;
    int mod2=1000000009;
    int p=228;
    string s, t;
    cin>>s>>t;
    int n=(int) s.size();
    int m=(int) t.size();
    vector<int> q1=powers(p, m, mod1);
    vector<int> q2=powers(p, m, mod2);
    vector<int> h1= hash_function(p, mod1, t);
    vector<int> h2= hash_function(p, mod2, t);
    unordered_set<int> pos1;
    unordered_set<int> pos2;
    int result1=0;
    int result2=0;
    for (int i=0; i<n; i++){
        result1+=s[i]*q1[n-1-i];
        result2+=s[i]*q2[n-1-i];
        result1%=mod1;
        result2%=mod2;
    }
    pos1.insert(result1);
    pos2.insert(result2);
    for (int i=0; i<n; i++){
        for (char x='A'; x<='Z'; x++){
            pos1.insert(res(mod1, q1, s, result1, i, x));
            pos2.insert(res(mod2, q2, s, result2, i, x));
        }
        for (char x='a'; x<='z'; x++){
            pos1.insert(res(mod1, q1, s, result1, i, x));
            pos2.insert(res(mod2, q2, s, result2, i, x));
        }
    }
    vector<int> ans;
    for (int i=0; i<=m-n; i++){
        if (pos1.count(hash_func(mod1, h1, q1, i, i+n)) && pos2.count(hash_func(mod2, h2, q2, i, i+n))){
            ans.push_back(i+1);
        }
    }
    cout<<ans.size()<<"\n";
    for (int x:ans){
        cout<<x<<" ";
    }
    return 0;
}