#include <fstream>
#include <cstdio>
#include <string.h>

using namespace std;

ifstream fin ("strmatch.in");
ofstream fout ("strmatch.out");

char v[4000005];
long long counter, raspuns[1001];
int z[4000005];

void z_alg(int n, int lungime)
{
    int l = 1, r = 1;
    for ( int i = 2; i <= n; ++i )
    {
        if ( i > r )
        {
            while ( z[i]+i <= n && v[z[i]+i] == v[z[i]+1]) z[i]++;
            l = i;
            r = z[i]+i-1;
        }
        else
        {
            if ( i+z[i-l+1]-1 < r ) z[i] = z[i-l+1];
            else
            {
                z[i] = r-i;
                while ( z[i]+i <= n && v[z[i]+i] == v[z[i]+1] ) z[i]++;
                l = i;
                r = z[i]+i-1;
            }
        }
        if ( z[i] == lungime )
        {
            counter++;
            if ( counter <= 1000 ) raspuns[counter] = i-lungime-2;
        }

    }
}

int main()
{
    int n, len;
    fin>>(v+1);
    len = strlen(v+1);
    v[len+1] = '#';
    fin>>(v+len+2);
    n = strlen(v+1);
    z_alg(n, len);
    fout<<counter<<'\n';
    for ( int i = 1; i <= counter; ++i )
        fout<<raspuns[i]<<" ";
}