#include <stdio.h>
#define Max 2000001

char a[Max],b[Max];
int u[Max],p[1001],d,n,nr;

void prefix()
{
    int k,i=1;
    k=-1; u[0]=k;
    while(a[(n=i)]!='\0')
    {
        while(k>-1 && a[k+1]!=a[i])k=u[k];
        if(a[k+1]==a[i])k++;
        u[i]=k;
        i++;
    }
    //for(int i=0;i<n;i++)printf("%d ",u[i]);
}

void kmp()
{
    int k,i=0;
    k=-1;
    while(b[i]!='\0')
    {
        while(k>-1 && a[k+1]!=b[i])k=u[k];
        if(a[k+1]==b[i])k++;
        if(k==n-1)
        {
            nr++;
            if(nr<=1000)p[++d]=i-n+1;
            k=u[k];
        }
        i++;
    }
}

int main()
{
    freopen("strmatch.in","r",stdin);
    freopen("strmatch.out","w",stdout);
        scanf("%s ",a);
        scanf("%s ",b);
        prefix();
        kmp();
        printf("%d\n",nr);
        if(nr>1000)nr=1000;
        for(int i=1;i<=nr;i++)printf("%d ",p[i]);
    return 0;
}