#include<stdio.h>
#include<string.h>
#define N 2000001
char p[N],t[N];
int n,m,urm[N],poz[N],cnt;
void urmt(char *p)
{
	int k=-1,x;
	urm[0]=0;
	for(x=1;x<m;x++)
	{
		while(k>0&&p[k+1]!=p[x])
			k=urm[x];
		if(p[k+1]==p[x])
		{
			k++;
			urm[x]=k;
		}
	}
}
int main()
{
	freopen("strmatch.in","r",stdin);
	freopen("strmatch.out","w",stdout);
	int i,x=-1;
	scanf("%s\n%s",&p,&t);
	n=strlen(t);
	m=strlen(p);
	urmt(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)
		{
			poz[++cnt]=i-m+1;
			x=urm[x];
		}
	}
	printf("%d\n",cnt);
	for(i=1;i<=cnt;i++)
		printf("%d ",poz[i]);
	return 0;
}