#include<cstdio>
#include<vector>
#include<cstring>
using namespace std;
FILE *f,*g;
int k,nr,n,i,m,v[1001],d[2000001],pi[2000001];
char a[2000001],b[2000001];
void prefix()
{pi[1]=0;
k=0;
for(i=2;i<=n;++i)
{while(k>0&&a[k+1]!=a[i])
	k=pi[k];
if(a[k+1]==a[i])
	++k;
pi[i]=k;
}}
int main()
{f=fopen("strmatch.in","r");
g=fopen("strmatch.out","w");
fgets(a+1,2000001,f);
fgets(b+1,2000001,f);
a[0]=' ';
b[0]=' ';
a[strlen(a)-1]=0;
b[strlen(b)-1]=0;
n=strlen(a)-1;
m=strlen(b)-1;
prefix();
k=0;
for(i=1;i<=m;++i)
{while(k>0&&a[k+1]!=b[i])
	k=pi[k];
if(a[k+1]==b[i])
	++k;
d[i]=k;
if(k==n)
	++nr;
}
//vreau 100 puncte
fprintf(g,"%d\n",nr);
for(i=1;i<=m;++i)
	if(d[i]==n)
		fprintf(g,"%d ",i-n);
fprintf(g,"\n");
fclose(f);
fclose(g);
return 0;
}