#include <fstream>
#include <cstring>
#define max_dim 2000010

using namespace std;


int nxt[max_dim], positions[1010];
char a[max_dim], b[max_dim];
int n, m, i, q, k;

int main()
{
    ifstream f("strmatch.in");
    ofstream g("strmatch.out");

    f>>a+1; n=strlen(a+1);
    f>>b+1; m=strlen(b+1);

    q=0;
    nxt[1]=0;

    for(i=2; i<=n; i++)
    {
        while(a[i]!=a[q+1] && q!=0)
        q=nxt[q];

        if(a[i]==a[q+1])
        ++q;

        nxt[i]=q;
    }

    q=0;
    for(i=1; i<=m; i++)
    {
        while(b[i]!=a[q+1] && q!=0)
        q=nxt[q];
        if(b[i]==a[q+1])
        q++;

        if(q==n)
        {
            k++;
            if(k<=1000) positions[k]=i-n;
            q=nxt[q];
        }
    }
    g<<k<<"\n";

    if(k>1000) k=1000;

    for (i=1; i<=k; i++)
    g<<positions[i]<<" ";

    return 0;
}