#include <stdio.h>
#include <string.h>

using namespace std;

FILE*f=fopen("strmatch.in","r");
FILE*g=fopen("strmatch.out","w");

char N[2000001],M[2000001];
int urm[2000003],v[1005];

int main()
{
    int n,m,i,k,q,nr=0;
    fscanf(f,"%s\n%s",N,M);

    //partea 1-formarea prefixelor lui N
    n=strlen(N);
    k=0;
    urm[1]=0;
    for (i=2;i<=n;i++)
    {
        while (k>0&&N[k]!=N[i-1]) k=urm[k];
        if (N[k]==N[i-1]) k++;
        urm[i]=k;
    }

    //partea 2-potrivirea

    m=strlen(M);
    q=0;
    for (i=0;i<m;i++)
    {
        while (q>0&&N[q]!=M[i]) q=urm[q];
        if (N[q]==M[i]) q++;
        if (q==n) {nr++;if (nr<1000) v[nr]=i-n+1;}
    }
    fprintf(g,"%d\n",nr);
    for (i=1;i<=nr&&i<=1000;i++)
    {
        fprintf(g,"%d ",v[i]);
    }
    fclose(g);
    fclose(f);
    return 0;
}