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

using namespace std;

#define NMAX 2000005

char A[NMAX],B[NMAX];

int lena,lenb,next[NMAX],C[NMAX],c=0;

void cit()
{
    fgets(A,NMAX,stdin);
    fgets(B,NMAX,stdin);

    lena=strlen(A)-1;
    lenb=strlen(B)-1;
}

void urmator(char *P)
{
    int k=-1,x;
    next[0]=0;
    for (x=1;x<lena;x++)
    {
        while (k>0 && P[k+1]!=P[x]) k=next[k];
        if (P[k+1]==P[x]) k++;
        next[x]=k;
    }
}

void rez()
{
    int i,x=-1,nr=0;
    urmator(A);
    for (i=0;i<lenb;i++)
    {
        while (x>0 && A[x+1]!=B[i]) x=next[x];
        if (A[x+1]==B[i]) x++;
        if (x==lena-1)
        {
            nr++;
            C[++c]=i-lena+1;
            x=next[x];
        }
    }
    if (c>999)
        c=999;
    printf("%d\n",nr);
    for (i=1;i<=c;i++)
        printf("%d ",C[i]);
    printf("\n");
}

int main()
{
    freopen ("strmatch.in","r",stdin);
    freopen ("strmatch.out","w",stdout);

    cit();
    rez();

    fclose(stdin);
    fclose(stdout);

    return 0;
}