#include<stdio.h>
#include <ostream>

FILE *fin,*fout;

char s1[2000002],s2[2000002];
int p[2000001],l1,l2;
int res[2000001],pos;

int main()
{
    fin=fopen("strmatch.in","r");
    fout=fopen("strmatch.out","w");

    s1[0]='K';

    for(l1=1;(s1[l1-1]>='A'&&s1[l1-1]<='Z')||s1[l1-1]>='a'&&s1[l1-1]<='z';l1++)
    {
        fscanf(fin,"%c",&s1[l1]);
    }
    l1--;
    l2=1;
    while(!feof(fin))
    {
        fscanf(fin,"%c",&s2[l2]);
        l2++;
    }
    l2--;
    int k=0;
    for(int i=2;i<l1;i++)
    {
        while(k>0&&s1[k+1]!=s1[i])
        {
            k=p[k];
        }
        if(s1[k+1]==s1[i])
        {
            k++;
        }
        p[i]=k;
    }

    k=0;
    for(int i=1;i<l2;i++)
    {
        while(s2[i]!=s1[k+1]&&k>0)
        {
            k=p[k];
        }
        if(s2[i]==s1[k+1])
        {
            k++;
        }
        if(k==l1-1)
        {
            pos++;
            res[pos]=i-k;
            k=p[k];
        }
    }
    fprintf(fout,"%d\n",pos);
    for(int i=1;i<=pos;i++)
    {
        fprintf(fout,"%d ",res[i]);
    }
}