# include <cstdio>
# include <cstring>
# include <iostream>
using namespace std;
int i,pi[2000003],n,m,k,nr,v[1005];
char x[2000003],y[2000003];
void constr_pi()
{
    k=0;
    pi[1]=0;
    for(i=2;i<=n;++i)
    {
        while(k>0 && x[i]!=x[k+1])
            k=pi[k];
        if(x[i]==x[k+1])++k;
        pi[i]=k;
    }
}
int main()
{
    freopen("strmatch.in","r",stdin);
    freopen("strmatch.out","w",stdout);
    gets(x+1);gets(y+1);
    x[0]=' ';y[0]=' ';
    m=strlen(y)-1;n=strlen(x)-1;
    constr_pi();k=0;
    for(i=1;i<=m;++i)
    {
        if(k>0 && y[i]!=x[k+1])
            k=pi[k];
        if(y[i]==x[k+1])++k;
        if(k==n)
        {
            if(nr<1000)
                v[++nr]=i-n;
            else ++nr;
            k=pi[k];
        }
    }
    printf("%d\n",nr);
    for(i=1;i<=min(nr,1000);++i)
        printf("%d ",v[i]);
    printf("\n");
    return 0;
}