#include <stdio.h>
#include <string.h>
#define minim(a, b) ((a < b) ? a : b)  
#define NM 2000002
char N[NM],M[NM];
int pi[NM], sol[1002];
FILE *f,*g;

int main()

{
int k,n,i,m,q;
long nr=1;

f=fopen("strmatch.in","rt");
g=fopen("strmatch.out","wt");

fgets(N+1,NM,f);
fgets(M+1,NM,f);

n = strlen(N+1);
N[n]=0;
n--;
k = 0;
pi[1] = 0;
for (i = 2; i <= n; i++)
    {
    while (k>0 && N[k+1]!=N[i])
	  k=pi[k];
    if (N[k+1]==N[i])
       k++;
    pi[i]=k;
    }


m = strlen(M+1); n = strlen(N+1);
q = 0;

for (i=1; i<=m; i++)
    {
    while (q > 0 && N[q+1] != M[i])
	 q = pi[q];
    if (N[q+1] == M[i])
	 q++;
    if (q==n) if (nr<=1001)  sol[nr++]=i-n;
              else nr++;

    }


fprintf(g,"%ld\n",nr-1);
for (i=1;i<=minim(nr-1,1000);i++)
    {
    fprintf(g,"%d ",sol[i]);
    }
fclose(f);
fclose(g);

return 0;
}