#include<stdio.h>
#include<string.h>
char s[2000001],u[2000001];
int v[1000],i,t,k,m,n,p[2000001];
int main() {
    freopen("strmatch.in","r",stdin),freopen("strmatch.out","w",stdout),gets(s),gets(u),m=strlen(s),n=strlen(u);
    for(i=m;i;i--)
        s[i]=s[i-1];
    for(i=n;i;i--)
        u[i]=u[i-1];
    for(i=2;i<=m;p[i++]=k) {
        for(;k&&s[k+1]!=s[i];k=p[k]);
        if(s[k+1]==s[i])
            k++;
    }
    for(k=0,i=1;i<=n;i++) {
        for(;k&&s[k+1]!=u[i];k=p[k]);
        if(s[k+1]==u[i])
            k++;
        if(k==m) {
            if(t<1000)
                v[t]=i-m;
            k=p[m],t++;
        }
    }
    printf("%d\n",t);
    for(i=0;i<(t<1000?t:1000);i++)
        printf("%d ",v[i]);
}