#include<stdio.h>
#include<string.h>
char s[2000000],a[2000000];
int p[2000000];
int d[1004];
int n,m;
int nr=0;
void calculprefix()
{
	int k = 0;
	p[0] = 0;
	
	for(int i=1;i<n;i++)
	{
		while(k > 0 && s[k + 1]!=s[i])
			k = p[k];
		
		if(s[k + 1] == s[i])
			 k = k + 1;
		
		p[i] = k;
	}
}

void kmp()
{
	int k=0;
	
	for(int i=0;i<m && nr<=1000;i++)
	{
		while(k > 0 && s[k + 1]!=a[i])
			k = p[k];
		
		if(s[k + 1] == a[i])
			 k = k + 1;
		
		if(k==n)
			{ 	nr++;
				d[nr]=i-n+1;
			}	
		
	}
}
	
int main()
{
	freopen("strmatch.in","r",stdin);
	freopen("strmatch.out","w",stdout);
	scanf("%s", &s);
	scanf("%s", &a);
	 n = strlen(s);
	 m = strlen(a);
	
	calculprefix();
	kmp();
	printf("%d\n", nr);
	for(int i=1;i<=nr;i++)
	printf("%d ", d[i]);
	return 1;
}