#include<cstdio>
#include<cstring>
using namespace std;
int urm[1001],n,m,k,x,i,aux,q,v[2000001];
char t[2000001],p[2000001],s[2000001];

void urmatorul(char *p)
{
	k=-1;
	urm[0]=0;
	for(x=1;x<m;x++){
		while(k>0 && p[k+1]!=p[x])k=urm[k];
		if(p[k+1]==p[x])k++;
		urm[x]=k;
	}
}

int main()
{
	freopen("strmach.in","r",stdin);
	freopen("strmach.out","w",stdout);
	scanf("%s\n",&t);
	scanf("%s",&p);
	n=strlen(t);
	m=strlen(p);
	x=-1;
	if(m>n){
		strcpy(s,p);strcpy(p,t);strcpy(t,s);
		aux=n;n=m;m=aux;
	}
	urmatorul(p);
	for(i=0;i<n;i++){
		while(x>0 && p[x+1]!=t[i])x=urm[x];
		if(p[x+1]==t[i])x++;
		if(x==m-1){
			q++;
			v[q]=i-m+1;
			x=urm[x];
		}
	}
	printf("%d\n",q);
	for(i=1;i<=q;i++)printf("%d ",v[i]);
	return 0;
}