#include<iostream>
#include<fstream>
using namespace std;
unsigned long n,m,i,nr,nrt=0,v[1000001];
char a[2000001],b[2000001];
int main()
{
	ifstream f("strmatch.in");
	ofstream g("strmatch.out");
	f>>a>>b;
	n=strlen(a);
	m=strlen(b);
	//cout<<'\n'<<n<<'\n'<<m<<'\n';
	nr=0;

	if(m>=n)
	{
		for(i=0;i<=m-1;i++)
		{
			if(a[nr]==b[i])
			{
				if(nr==n-1) 
				{
					nrt++;
					v[nrt]=i-n+1;
					nr=-1;i=i-n+1;
				}
				nr++;
			}
			else if(a[nr]!=b[i])
			{
				i-=nr;
				nr=0;
			}
		}
		g<<nrt<<'\n';
		for(i=1;i<=nrt;i++)
			g<<v[i]<<" ";
	}
	
	else
	{
		for(i=0;i<=n-1;i++)
		{
			if(b[nr]==a[i])
			{
				if(nr==m-1) 
				{
					nrt++;
					v[nrt]=i-m+1;
					nr=-1;i=i-m+1;
				}
				nr++;
			}
			else if(b[nr]!=a[i])
			{
				i-=nr;
				nr=0;
			}
		}
		g<<nrt<<'\n';
		for(i=1;i<=nrt;i++)
		g<<v[i]<<" ";
	
	}
}