#include <iostream>
#include <stdio.h>
#include <bits/stdc++.h>

#define NMAX  2000003

using namespace std;

int n,m,i,k,nr,nr2;
int urm[NMAX];
int v[NMAX];

char t[NMAX];
char p[NMAX];

void make_prefix(){
    int i,k=-1;

    urm[0]=0;
    for(i=1;i<m;i++){
        while(k>0 && p[k+1]!=p[i])
            k=urm[k];

        if(p[k+1]==p[i])k++;
        urm[i]=k;

    }
}

int main()
{
    freopen("strmatch.in","r",stdin);
    freopen("strmatch.out","w",stdout);

    gets(p);
    gets(t);

    n=strlen(t);
    m=strlen(p);

    make_prefix();


    k=-1;
    for(i=0;i<n;i++){

        while(k && p[k+1]!=t[i])
            k=urm[k];

        if(p[k+1]==t[i])
            k++;

        if(k==m-1){
            v[++nr2]=i-m+1;
            k=urm[k];
        }



    }

    printf("%d\n",min(1000,nr2));
    for(i=1;i<=min(nr2,1000);i++)
        printf("%d ",v[i]);

    return 0;
}