#include <bits/stdc++.h>
#define mod 1000000007
#define P 73
using namespace std;
ifstream fin("strmatch.in");
ofstream fout("strmatch.out");

char a[2000200], b[2000200];
long long nr,nr1;
int fr, ans[2000200];
int main()
{

    fin.getline(a,2000200);
    fin.getline(b,2000200);
    long long exp=1;
    int n=strlen(a), m=strlen(b);

    for(int i=0;i<n;++i)
    {
        nr=(nr*P+b[i])%mod;
        nr1=(nr1*P+a[i])%mod;
        exp=exp*P%mod;
    }
    exp=exp/P;

    if(nr1==nr)
    {
        ++fr;
        ans[fr]=0;
    }

    for(int i=n;i<m;++i)
    {
        nr=(((nr-b[i-n]*exp)%mod+mod)*P+b[i])%mod;
        if(nr1==nr)
        {
            ++fr;
            ans[fr]=i-n+1;
        }
    }

    fout<<fr<<'\n';
    for(int i=1;i<=fr;++i)
        fout<<ans[i]<<" ";

    return 0;
}