#include <iostream>
#include<cstring>
#include<cstdio>
using namespace std;
int urm[2000005],n,m,nr,apar[1005];
char t[2000005],p[2000005];


void urmator(char p[])
{
    int m=strlen(p+1);
    urm[1]=0;
    int q=0;
    for(int i=2;i<=m;i++)
    {
        while(q>0&&p[q+1]!=p[i])
            q=urm[q];
        if(p[q+1]==p[i])q++;
        urm[i]=q;
    }
}

int main()
{
    freopen("strmatch.in","r",stdin);
    freopen("strmatch.out","w",stdout);
    scanf("%s %s", p+1, t+1);
    p[0]=' ';
    t[0]=' ';
    n=strlen(t+1);
    m=strlen(p+1);
    urmator(p);
    int q=0;
    for(int i=1;i<=n;i++)
    {
        while(q>0&&p[q+1]!=t[i])
            q=urm[q];
        if(p[q+1]==t[i])
            q++;
        if(q==m)
        {
            q=urm[q];
            if(nr<1000)
                apar[nr]=i-m;
            nr++;
        }
    }
    printf("%d\n",nr);
    for(int i=0;i<nr;i++)
        printf("%d ",apar[i]);
    return 0;
}