#include <iostream>
#include<stdio.h>
#include<cstdlib>
#include<string.h>
using namespace std;
FILE *f,*g;
int n,m,i,j,first,curr,val[2000000],l;
char a[2000000],b[2000000];
int kmp[2000000];
int main()
{
    f=fopen("strmatch.in","r");
    g=fopen("strmatch.out","w");
    fscanf(f,"%s%s",&a,&b);
    n=strlen(a);
    m=strlen(b);
    kmp[0]=0;
    for(i=1;i<=n-1;i++)
        {
           j=kmp[i-1];
           while(j&&a[i]!=a[i-j])  j=kmp[i-j];
           if (j==0) {if (a[i]==a[0]) kmp[i]=i; else kmp[i]=0;}
           else kmp[i]=j;

        }

    if (a[0]==b[0]) {first=0;}
    else {first=-1;}
    for(i=1;i<=m;i++)
        {
            if (first==-1)
                {
                    if (a[0]==b[i]) {first=i;}
                }
            else
                {
                    if (a[i-first]==b[i])
                        {

                            if (i-first==n-1)
                                {
                                    l++;
                                    val[l]=first;
                                    if (l==1000) break;
                                    if (kmp[n-1]==0) {first=-1;}
                                    else {first+=kmp[n-1];}
                                }
                        }
                    else
                        {
                            while(kmp[i-1-first]!=0&&b[i]!=a[i-first]) first+=kmp[i-1-first];
                            if (b[i]!=a[i-first]) first=-1;
                        }
                }
        }
    fprintf(g,"%d\n",l);
    for(i=1;i<=l;i++) fprintf(g,"%d ",val[i]);
    return 0;

}