#include <bits/stdc++.h>
#define NMAX 2000001
using namespace std;
ifstream fin("strmatch.in");
ofstream fout("strmatch.out");

char A[NMAX],B[NMAX];
int pi[NMAX];
int v[1024];
int main()
{
    int a,b,i,k,q;
    fin>>A>>B;
    a=strlen(A);
    for(i=a;i>=1;i--)
        A[i]=A[i-1];
    A[a+1]=0;
    b=strlen(B);
    for(i=b;i>=1;i--)
        B[i]=B[i-1];
    B[b+1]=0;
    pi[1]=0;
    A[0]=' ';
    B[0]=' ';
    k=0;
    for(i=2;i<=a;++i)
    {
        while(k>0&&A[k+1]!=A[i]) k=pi[k];
        if(A[k+1]==A[i]) k++;
        pi[i]=k;
    }
    q=0;
    k=0;
    for(i=1;i<=b;++i)
    {
        while(q>0&&A[q+1]!=B[i]) q=pi[q];
        if(A[q+1]==B[i]) q++;

        if(q==a) {q=pi[a],k++;
        if(k<=1000)v[k]=i-a;}
    }

    fout<<k<<"\n";
    for(i=1;i<=min(k,1000);++i)
         fout<<v[i]<<" ";
    return 0;
}