#include <cstdio>
#include <cstring>

using namespace std;

const int SMAX = 2000005;

char a[SMAX],b[SMAX];

int pi[SMAX];

int n,m;

void make_prefix(){
	pi[1]=0;
	int q=0;
	for(int i=2;i<=m;++i){
		while(q && a[q+1]!=a[i])
			q=pi[q];
		if(a[q+1]==a[i])
			q++;
		pi[i]=q;
	}
}

int cnt;
int poz[SMAX];

void kmp(){
	int q=0;
	for(int i=1;i<=n;++i){
		while(q && a[q+1]!=b[i])
			q=pi[q];
		if(a[q+1]==b[i])
			q++;

		if(q==m){
			q=pi[m];
			cnt++;
			poz[cnt]=i-m;
		}
	}
}

int main(){
	freopen("strmatch.in","r",stdin);
	freopen("strmatch.out","w",stdout);

	scanf("%s\n%s\n",a+1,b+1);

	a[0]=' ';
	b[0]=' ';
	
	n=strlen(b)-1;
	m=strlen(a)-1;

	make_prefix();

	kmp();

	printf("%d\n",cnt);

	for(int i=1;i<=cnt;++i)
		printf("%d ",poz[i]);

	return 0;
}