#include <cstdio>
#include <cstring>
#define MAXIM 2000001

using namespace std;

char s[MAXIM], s1[MAXIM];
int nr,poz[MAXIM],k,sol[MAXIM],zz;

void pref(char s[])
{
    for(unsigned int i=1;i<strlen(s);i++)
    {
        while(k && s[k]!=s[i])
            k=poz[k];
        if(s[k]==s[i])
            k++;
        poz[i+1]=k;
    }
}

void cauta()
{
    k=0;
    for(unsigned int i=0;i<strlen(s1);i++)
    {
        while(k && s[k]!=s1[i])
            k=poz[k];
        if(s[k]==s1[i])
            k++;
        if(k==strlen(s))
        {
            nr++;
            sol[zz++]=i-strlen(s)+1;
            k=poz[k];
        }
    }
}

int main()
{
    freopen("strmatch.in","r",stdin);
    freopen("strmatch.out","w",stdout);
    scanf("%s\n%s",s,s1);
    pref(s);
    cauta();
    printf("%d\n",nr);
    for(int i=0;i<zz;i++)
        printf("%d ",sol[i]);
    fclose(stdin);
    fclose(stdout);
    return 0;
}