#include <cstdio>
#include<cstring>
#define MAX 2003
using namespace std;
char a[MAX],b[MAX];
int pi[MAX],rez[MAX];
void makepi(int n)
{
    int k=0;
    pi[1]=0;
    for(int i=2; i<=n; i++)
    {
        while(k>0 && a[k+1]!=a[i])
            k=pi[k];
        if(a[k+1]==a[i])
            k++;
        pi[i]=k;
    }

}
int main()
{
    FILE *fin,*fout;
    fin=fopen("strmatch.in","r");
    fout=fopen("strmatch.out","w");
    int la,lb;
    fgets(1+a,sizeof(a),fin);
    fgets(1+b,sizeof(b),fin);
    la=strlen(1+a) - 1;
    lb=strlen(1+b) - 1;
    makepi(la);
    int q=0,cnt=0,cnt2=0;
    for(int i=1; i<=lb; i++)
    {
        while(q>0 && a[q+1]!=b[i])
            q=pi[q];
        if (a[q+1]==b[i])
            q++;

        if(q==la)
        {
            cnt++;
            if(cnt2<1000)
                rez[++cnt2]=i-la;

        }
    }
        fprintf(fout,"%d\n",cnt);
        for(int i=1; i<=cnt2; i++)
            fprintf(fout,"%d ",rez[i]);

    return 0;
    }