// infoarena: problema/strmatch //
#include <string.h>
#include <stdio.h>
#define MAXN 2000100

FILE *in=fopen("strmatch.in", "r"), *out=fopen("strmatch.out", "w");

char a[MAXN],b[MAXN];
int i,j,n,m,l[MAXN],k,q,r[MAXN];

int main()
{
	fscanf(in, "%s", a);
	fscanf(in, "%s", b);
	
	n = strlen(a);
	m = strlen(b);
	
	if(n>m)
	{
		fprintf(out, "0");
		return 0;
	}
	
	l[0] = 0;
	for(i=1; i<n; i++)
	{
		while(k>0 && a[k] != a[i])
			k = l[k];
		if(a[k] == a[i])
			k++;
		l[i] = k;
	}
	
	k=0;
	for(i=0; i<m; i++)
	{
		while(k>0 && a[k] != b[i])
			k=l[k-1];
		if(a[k] == b[i])
			k ++;
		if(k == n)
		{
			r[++q] = i-n+1;
		}
	}
	fprintf(out, "%d\n", q);
	
	if(q>1000)
		q=1000;
	for(i=1; i<=q; i++)
		fprintf(out, "%d ", r[i]);
	
	return 0;
}