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

using namespace std;

int pi[2000001],ans[2000001],v[2000001];
char a[2000001],b[2000001];
int main()
{
    freopen("strmatch.in","r",stdin);
    freopen("strmatch.out","w",stdout);
    char c;
    int nr=0,n=1,m=1,k,i;
    c=getchar();
    a[n]=c;
    n++;
    while(c!=10)
    {
        c=getchar();
        a[n]=c;
        n++;
    }
    n-=2;
    c=getchar();
    b[m]=c;
    m++;
    while(c!=10)
    {
        c=getchar();
        b[m]=c;
        m++;
    }
    m-=2;
    pi[1]=0;
    k=0;
    for(i=2;i<=n;i++)
    {
        while(k!=0 && a[k+1]!=a[i])
            k=pi[k];
        if(a[k+1]==a[i])
            k++;
        pi[i]=k;
    }
    k=0;
    for(i=1;i<=m;i++)
    {
        while(k!=0 && a[k+1]!=b[i])
            k=pi[k];
        if(a[k+1]==b[i])
            k++;
        ans[i]=k;
        if(k==n)
        {
            nr++;
            if(nr<=1000)
                v[nr]=i-n;
            k=pi[n];
        }
    }
    cout<<nr<<'\n';
    if(nr<=1000)
        for(i=1;i<=nr;i++)
            cout<<v[i]<< " ";
    else
        for(i=1;i<=1000;i++)
            cout<<v[i]<< " ";
    return 0;
}