#include<stdio.h>
#include<string.h>
#define Nmx 2000002

char s1[Nmx],s2[Nmx];
int v[Nmx],n,m,sol[Nmx],nr;

void citire()
{
    fgets(s1+1,Nmx,stdin);
    n=strlen(s1+1)-1;
    fgets(s2+1,Nmx,stdin);
    m=strlen(s2+1)-1;
}

void solve()
{
    int k=0;
    v[0]=0;
    for(int i=2;i<=n;++i)
    {
        while(k&&s1[k+1]!=s1[i])
            k=v[k];
        if(s1[k+1]==s1[i])
            ++k;
        v[i]=k;
    }
    k=0;
    for(int i=1;i<=m;++i)
    {
        while(k&&s2[i]!=s1[k+1])
            k=v[k];
        if(s1[k+1]==s2[i])
            ++k;
        if(k==n)
        {
            k=v[n];
            ++nr;
            if(nr<=1000) sol[nr]=i-n;
        }
    }
    printf("%d\n",nr);
    if(nr>1000)
        nr=1000;
    for(int i=1;i<=nr;++i)
        printf("%d ",sol[i]);
    printf("\n");
}

int main()
{
    freopen("strmatch.in","r",stdin);
    freopen("strmatch.out","w",stdout);
    citire();
    solve();
    return 0;
}