#include <cstdio>
#include <cstring>
#define N 2000010
using namespace std;
char a[N],b[N];
int urmator[N],h[N],z;
void formare(char p[N])
{
    int i,j,m=strlen(p);
    urmator[0]=-1;
    for(i=0,j=-1;i<m;i++,j++,urmator[i]=j)
        while(j>=0 && p[i]!=p[j])
            j=urmator[j];
}
void rezolvare(char *p,char *q)
{
    int i,j,m=strlen(p),n=strlen(q);
    for(i=0,j=0;i<n;i++,j++)
    {
        while(j>=0 && p[j]!=q[i])
            j=urmator[j];
        if(j==m-1)
            h[z++]=i-m+1;
    }
}
int main()
{
    freopen("strmatch.in","r",stdin);
    freopen("strmatch.out","w",stdout);
    gets(a);
    gets(b);
    formare(a);
    rezolvare(a,b);
    printf("%d\n",z);
    for(int i=0;i<z;i++)
        printf("%d ",h[i]);
    return 0;
}