#include<stdio.h>
#include<string.h>
char s[2000005],u[2000005];
int v[1005],i,t,k,m,n,j,p[2000005],q;
int main() {
	freopen("strmatch.in","r",stdin),freopen("strmatch.out","w",stdout),fgets(s,sizeof(s),stdin),fgets(u,sizeof(u),stdin),m=strlen(s),n=strlen(u);
	for(i=2;i<m;i++) {
		for(;k&&s[k+1]!=s[i];k=p[k]);
      	if(s[k+1]==s[i])
            k++;
      	p[i]=k;
	}
	for(j=1;j<n;j++) {
		for(;q&&s[q+1]!=u[j];q=p[q]);
      	if(s[q+1]==u[j])
            q++;
      	if(q==m-1) {
		  	if(t<1000)
                v[t]=j-m+1;
            q=p[m-1],t++;
		}
	}
	printf("%d\n",t);
	for(i=0;i<t;i++)
    	printf("%d ",v[i]);
}